Snapdax, Apex of the Hunt

Mutate {2}{B/R}{W}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Double strike
Whenever this creature mutates, it deals 4 damage to target creature or planeswalker an opponent controls and you gain 4 life.

Mutation {2}{B/R}{W}{W}
Double initiative
À chaque fois que cette créature subit une mutation, elle inflige 4 blessures à une cible, créature ou planeswalker, qu'un adversaire contrôle et vous gagnez 4 points de vie.