Explorative Zoologist

Token creatures you control have Trample.
Experiment - During your endstep, as long as you
have cast a creature spell and a sorcery spell this
turn, create a 2/2 green Wolf creature token.
When Explorative Zoologist dies, if you control a Krypto Cronos plane, you may pay {x}. If you do, search your library for a creature with converted
mana cost of X, reveal it and put it into your
hand. Shuffle.