Ammit Eternal
{2}{B}
Creature -- Zombie Crocodile Demon
5/5
Afflict 3 (Whenever ~this~ becomes blocked, defending player loses 3 life.)
Whenever an opponent casts a spell, put a -1/-1 counter on ~this~.
Whenever ~this~ deals combat damage to a player, remove all -1/-1 counters from it.
Witherscale Wurm
{4}{G}{G}
Creature -- Wurm
9/9
Whenever ~this~ blocks or becomes blocked by a creature, that creature gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.)
Whenever ~this~ deals damage to an opponent, remove all -1/-1 counters from it.