Distribute X +1/+1 counters among any number of creatures you control, where X is the amount of {S} spent to cast this spell. Then draw a card for each creature you control with power 4 or greater.

Trample Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.

Trample When this creature enters, you may search your library for an Aurochs card, reveal it, put it into your hand, then shuffle. Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.

Whenever another nontoken creature enters, you may pay {1}{G}. If you do, that creature's controller creates a token that's a copy of that creature.

Trample Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.

Changeling (This card is every creature type.) As this creature enters, choose a creature type. You may look at the top card of your library any time. You may cast creature spells of the chosen type from the top of your library.

Trample Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking Aurochs. {2}{S}: Target creature blocks target creature this turn if able. ({S} can be paid with one mana from a snow source.)

Green creatures you control get +1/+1. Whenever a green creature you control enters, scry 1.