The source video is from April 2025, shortly after Mister Fantastic's Season 2 update. One core mechanic -- what happens when he "goes big" -- has since changed in a way that matters for how you read his health bar, and one of his two team-ups has been retired entirely. Both are called out explicitly below, and both are backed by the video's own on-screen stat cards, not just narration.
Correction, backed by the source video's own on-screen stat card above: at the time this video was recorded, reaching 100 elasticity and inflating granted 400 bonus health for 6 seconds -- a separate, temporary health pool layered on top of his base 375. The current Marvel Rivals Wiki confirms this changed: inflating now increases his maximum health by 350 instead of adding bonus health, and the wiki's own changelog explicitly notes this shift happened at some point after the video's recording. The practical difference matters: bonus health behaves differently from an increased max health pool (it's tracked and can expire independently of healing), and the number itself also dropped from 400 to 350. If you're used to older Mister Fantastic footage describing "400 free HP," treat that as accurate to when it was recorded rather than to today's numbers -- verify your own client's tooltip before planning around a specific figure.
Regardless of the exact mechanic, the underlying gameplan hasn't changed: edge your elasticity high before a fight, punch once to three times to go big for free, then use your team's peel or your own kit to survive the window where you're an oversized, highly visible target. Big form also loses range (8m vs. 15m) and bumps attack speed to about 0.92 seconds per swing at 80 damage -- a squishy still takes four hits to kill in big form (320 damage), not meaningfully faster than three True-form hits at 65, so the real draw is the health and speed, not raw burst. ## Distended Grip and Flexible Elongation: pulls, boops, and saves Distended Grip reaches 20 meters and grabs an enemy, dealing 20 damage on the initial grab and letting you follow up within a 3-second window either by pulling that same target 10 meters for an additional 50 damage, or grabbing a second target and smashing the two together for 30 damage each. It generates 30 elasticity per use and is on a 6-second cooldown -- cycling it into a nearby wall or floor rather than an enemy is one of the fastest ways to rebuild elasticity between fights.  Flexible Elongation pulls Mister Fantastic to a target -- dealing 30 damage to an enemy, or granting both himself and a targeted ally 75 bonus health. It's his only small-form ability that penetrates shields, which makes it a real answer to a Doctor Strange, Magneto, or Emma Frost trying to back out behind cover. It has two charges on an 8-second cooldown and generates 20 elasticity, but only if it actually connects with a target -- whiffing it (say, because the target got stunned or displaced) costs you the cooldown without the elasticity payoff, which is worth knowing before you rely on it to build resource. It also has genuinely strange interactions with other mobility abilities and teleport portals: grabbing someone mid-dash can drag you along with them, which is how the aerial pull on Spider-Man above happens. ## Reflexive Rubber: his escape tool  Reflexive Rubber turns Mister Fantastic into a temporary, fully damage-immune shield shape. The on-screen stat card above confirms every number matches the current wiki exactly, meaning this ability hasn't changed since the video was recorded: it absorbs up to 300 damage over a 3-second window (or until you cancel it early), then fires a projectile dealing 60% of whatever was absorbed, at an 80 meter-per-second travel speed. It reduces his walk speed by 35% while active and has a 12-second cooldown. He can't attack or use other abilities while shielded, but the current wiki (and current game) lets him cast his ultimate directly out of this ability -- worth knowing if you're chaining survival into offense. ## Brainiac Bounce: his ultimate  Brainiac Bounce sends Mister Fantastic leaping and bouncing across the ground, dealing area damage and slowing enemies with every impact. Current wiki figures match the source video with no changes: 400 bonus health on cast (this does not stack with an active Elastic Strength inflation -- it simply refills to the 400 cap), a minimum of 3 bounces up to a maximum of 6 if you keep landing hits, base damage of 70 on a direct hit that increases by 14 with each successive bounce, and a 10% slow per hit that stacks up to 60%. Missing a bounce (or hitting only shields, which counts as a miss even though it does damage) ends the ultimate early. A commonly missed detail: the slow effect is significant enough that teammates should actively chase down enemies caught under a bouncing Mister Fantastic rather than letting them walk out of the radius. ## Team-ups: one retired, one still active Major correction: the source video describes a team-up with Invisible Woman (also including The Thing or Human Torch), called Wedded Harmony in the game's own menus, that converts missing health into a regenerating bonus-health pool for 5 seconds. The stat card above -- captured directly from the video's own practice range -- confirms the exact numbers that were live at the time: 5-second duration, 20-second cooldown, 100% damage-to-health conversion, with Invisible Woman named as the team-up target. The current Marvel Rivals Wiki explicitly flags this same team-up (there listed as part of the broader "Fantastic Four" bond) as UNAVAILABLE IN THE CURRENT SEASON. This matches the identical finding already documented on this catalogue's own Invisible Woman and Rocket Raccoon guides, which independently reached the same conclusion from the other characters' wiki pages -- so this is now confirmed from three separate angles. Don't plan a "First Family" team comp around this ability; it isn't currently live.
The current wiki lists a second Mister Fantastic team-up the source video never mentions at all: Fantastic Amplifier, active with Rocket Raccoon, which removes Mister Fantastic's automatic elasticity cap -- letting him choose when to inflate manually rather than being forced into it at exactly 100 elasticity, at the cost of expending elasticity while attacking in that state. This is currently active and not flagged as unavailable, but since the source video predates it, this guide can't add gameplay commentary on it beyond what the wiki states. ## Matchups and team comps  He wins the large majority of 1v1s -- Magik, Black Panther, Psylocke and Hawkeye are all cited as clean wins with enough elasticity banked. The matchups that give him real trouble are ranged flyers with room to kite (Black Widow, Hawkeye, Iron Fist, Punisher, Bucky), since they can deny the grab range he needs to shut down mobility. In team fights, Hela, Hawkeye, Iron Fist and Human Torch are named as the biggest threats to his game plan specifically because they're good at bursting him out of big form before his team can react. Triple-support comps also tend to make him feel weaker, since there's less pressure for his cleave damage to punish.  Good pairings include Venom, The Thing, Iron Fist, Hulk, Captain America, and really any other diver or melee hero he can set up kills for. Among supports, Mantis and Rocket Raccoon are called out specifically -- Mantis for her damage buff synergy with his cleave potential in big form, and Rocket for the raw healing volume that lets Mister Fantastic lean into 400 HP of self-sufficiency rather than needing constant attention. ## Advanced tips and combos worth knowing His punches, Distended Grip, and Flexible Elongation can all cancel into each other, and Reflexive Rubber can cancel into his ultimate -- learning which abilities cancel into which is more valuable than memorizing rigid combo strings. Two specific sequences are worth knowing by name: a finisher combo (punch, cancel into Flexible Elongation, punch, cancel into Distended Grip) that deals exactly 250 damage in about 3.17 seconds -- the fastest kill confirmed on a single target -- and a "trying not to die" combo (punch, cancel into Distended Grip on the ground rather than an enemy, punch, cancel into Flexible Elongation) that rebuilds elasticity from zero back to nearly-big in roughly 7.36 seconds when you desperately need your big-form health back.Worth addressing directly since it's a commonly searched phrase: there is no single "1000 HP combo" on Mister Fantastic. His effective health ceiling comes from stacking his base 375 with whichever bonus-health source is active at the time (up to 350-400 from inflating, or 400 from his ultimate -- these don't stack with each other), plus whatever Flexible Elongation or a team-up adds. Depending on exact timing that can approach 800-900 in a best case, but "1000 HP" isn't a real, repeatable number in his current kit -- treat any claim of an exact four-digit combo with skepticism.
## How this guide was fact-checked Every ability figure in this guide was checked against Mister Fantastic's current Marvel Rivals Wiki page and cross-referenced against the source video, which is from April 2025 (shortly after his Season 2 update). Stretch Punch, Distended Grip, Flexible Elongation, Reflexive Rubber, and every Brainiac Bounce ultimate figure all matched the current wiki exactly -- for Reflexive Rubber specifically, this is confirmed by the video's own in-game stat card, screenshotted above, rather than by narration alone. Two real changes were found and are called out explicitly in the body: the Elastic Strength inflation mechanic, which the video's own on-screen stat card proves granted 400 bonus health at the time of recording, versus the current wiki's confirmation that inflating now increases max health by 350 instead; and the Wedded Harmony team-up with Invisible Woman, which the video's own practice-range stat card confirms was live with a working 5s/20s/100% kit at the time, but which the current wiki explicitly flags as unavailable this season -- independently corroborated by this same finding already appearing on both this catalogue's Invisible Woman and Rocket Raccoon guides. A second team-up (Fantastic Amplifier, with Rocket Raccoon) exists on the current wiki with no equivalent in the source video, and is presented without invented gameplay commentary since the video predates it entirely. ## What this guide doesn't answer This guide doesn't give a current tier-list ranking for Mister Fantastic or claim he's a mandatory pick -- Duelist viability shifts with balance patches, and this guide focuses on kit mechanics that are either confirmed current or explicitly flagged as changed. It doesn't cover exact numbers for the Fantastic Amplifier team-up with Rocket Raccoon, since the source video predates that team-up entirely and the current wiki's own description doesn't give a detailed damage or elasticity-cost breakdown -- verify specifics in-game. And despite the "1000 HP combo" search term this guide addresses directly above, it doesn't invent a specific number to match that phrase, since no combination of his current abilities reliably produces that exact figure. This guide also doesn't cover crosshair customization specifically for Mister Fantastic, since the source video doesn't open its crosshair settings menu -- see this catalogue's dedicated settings guides for general crosshair advice that applies across heroes. As of the Season 9 patch verified elsewhere in this catalogue's own settings coverage, none of the ability figures confirmed above (outside the two explicitly flagged corrections) have changed. --- ## FAQ ### What happens when Mister Fantastic 'goes big' now? Reaching 100 elasticity now increases his maximum health by 350 rather than granting a separate 400 bonus-health pool, which is how it worked at Season 2. The gameplan is unchanged -- build elasticity passively, then go big for free at the start of a fight -- but the exact mechanic behind his health bar has been updated since. ### Is there really a 1000 HP combo on Mister Fantastic? No. His effective health ceiling comes from stacking his base 375 with one active bonus-health source at a time (inflating or his ultimate, which don't stack with each other) plus Flexible Elongation's self-heal, which can approach 800-900 in a best case but doesn't reliably reach 1000. Treat any claim of an exact four-digit combo with skepticism. ### Is Mister Fantastic's First Family team-up with Invisible Woman still available? No. This team-up (Wedded Harmony in the game's menus) is confirmed unavailable in the current season by the Marvel Rivals Wiki -- a finding independently confirmed across three guides in this catalogue (Mister Fantastic, Invisible Woman, and Rocket Raccoon). A separate team-up with Rocket Raccoon, Fantastic Amplifier, is currently active instead. ### Is Mister Fantastic good for beginners? Not especially -- his individual inputs are simple, but managing elasticity, reading when to go big, and cycling constantly between frontline and backline give him a real learning curve. Expect to spend real time in the practice range before his kit clicks. ### What counters Mister Fantastic? Ranged flyers with room to kite -- Black Widow, Hawkeye, Iron Fist, Punisher and Bucky -- give him the most trouble by denying his grab range. In team fights, Hela, Hawkeye, Iron Fist and Human Torch are especially good at bursting him out of his big-form state before his team can react.