Bloodtracker
{3}{B}
Creature -- Vampire Wizard
2/2
Flying
{B}, Pay 2 life: Put a +1/+1 counter on ~this~.
When ~this~ leaves the battlefield, draw a card for each +1/+1 counter on it.
Thought Gorger
{2}{B}{B}
Creature -- Horror
2/2
Trample
When ~this~ enters, put a +1/+1 counter on it for each card in your hand. If you do, discard your hand.
When ~this~ leaves the battlefield, draw a card for each +1/+1 counter on it.
Toothy, Imaginary Friend
{3}{U}
Legendary Creature -- Illusion
1/1
Partner with Pir, Imaginative Rascal (When ~this~ enters, target player may put Pir into their hand from their library, then shuffle.)
Whenever you draw a card, put a +1/+1 counter on ~this~.
When ~this~ leaves the battlefield, draw a card for each +1/+1 counter on it.