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.
Ebon Praetor
{4}{B}{B}
Creature -- Avatar Praetor
5/5
First strike, trample
At the beginning of your upkeep, put a -2/-2 counter on ~this~.
Sacrifice a creature: Remove a -2/-2 counter from ~this~. If the sacrificed creature was a Thrull, put a +1/+0 counter on ~this~. Activate only during your upkeep and only once each turn.
Magmaroth
{3}{R}
Creature -- Elemental
5/5
At the beginning of your upkeep, put a -1/-1 counter on ~this~.
Whenever you cast a noncreature spell, remove a -1/-1 counter from ~this~.