Darwin, Adaptive Mutant

Legendary Creature — Mutant Hero — {1}{G}

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) Remove two +1/+1 counters from Darwin: He gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy him.)