It was challenging to create him because there are already plenty of slashing/healing strikers in the game. But wolverine needs his arch-nemesis so I hope I succeeded in coming up with something that feels thematic and yet at least a little different than what already exists.
Sabretooth (Classic) 
Level 270: HP: 14356 Tile Damage: 11/82/73/10/11/64/4.0x
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Savage Maul - Cost: 8 
AP
Sabretooth savagely mauls the opponent dealing 491 damage to the target.
If the target is stunned, he takes advantage of their weakened state dealing 82 additional damage for each friendly attack tile on the board, and healing himself for 438.
Level Upgrades
-
Level 2: 686 damage, 114 damage / attack tile, heals 614.
Level 3: 880 damage, 147 damage / attack tile, heals 789.
Level 4: 1269 damage, 212 damage / attack tile, heals 1140.
Level 5: 2055 damage, 343 damage / attack tile, heals 1842.Max Level - 4004 damage, 667 damage / attack tile, heals 3649
Crippling Claw - Cost: 7 
AP
Sabretooth rends his claws into his opponent’s weak spot, dealing 645 damage and stunning them 1 turn.
Level Upgrades
-
Level 2: 903 damage.
Level 3: Stuns 2 turns.
Level 4: 1264 damage.
Level 5: 1769 damage, stuns 3 turns.Max Level - 3450 damage.
Furious Rush - Cost: 10 
AP
Sabretooth barrels into his enemy, knocking them into their allies and leaving them bleeding. Deals 603 damage to the target and 320 damage to all other enemies, then adds a strength 52
attack tile for each enemy left up.
Level Upgrades
-
Level 2: 840 / 411 damage, strength 55 attack tiles.
Level 3: 1069 / 503 damage, strength 57 attack tiles.
Level 4: 1553 / 731 damage, strength 64 attack tiles.
Level 5: 2476 / 914 damage, strength 77 attack tiles.Max Level - 4903 / 1808 damage, strength 151 attack tiles.