For example, if you control The Ozolith ("Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.") when Zack Fair's last ability resolves, you'll put the appropriate number of each kind of counter onto both The Ozolith and the target creature.
As it is, the Hedrons feel almost cartoon-y in comparison, and it doesn't quite work as a whole piece
Put those creature cards onto the battlefield, then shuffle the rest into your library
Bennie Bracks, Zoologist Bennie Bracks, Zoologist is a pretty darn expensive MTG card right now, which may go some way to revealing what a fantastic card draw option it is for white decks
Creature - Wizard Elf Color tag templates(None) Welcoming Vampire Flying Whenever one or more other creatures you control with power 2 or less enter, draw a card
There are game stores that have card 'bins' for a wide variety of card games