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

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

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

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

You may have Clever Impersonator enter the battlefield as a copy of any nonland permanent on the battlefield.

Changeling (This card is every creature type.) When Masked Vandal enters the battlefield, you may exile a creature card from your graveyard. If you do, exile target artifact or enchantment an opponent controls.

Changeling (This card is every creature type.) You may have Moritte of the Frost enter the battlefield as a copy of a permanent you control, except it's legendary and snow in addition to its other types and, if it's a creature, it enters with two additional +1/+1 counters on it and has changeling.

When Mwonvuli Beast Tracker enters the battlefield, search your library for a creature card with deathtouch, hexproof, reach, or trample and reveal it. Shuffle and put that card on top.

({U/P} can be paid with either {U} or 2 life.) You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.

Trample Whenever Rimehorn Aurochs 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.)

Flash You may have Stunt Double enter the battlefield as a copy of any creature on the battlefield.

Changeling (This card is every creature type.)

All creatures have haste.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Create a token that's a copy of target creature you control. Flashback {5}{U}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Draw two cards. Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.

Copy target creature spell you control, except it isn't legendary if the spell is legendary. (A copy of a creature spell becomes a token.)

Prevent all combat damage that would be dealt to you this turn. Populate. (Create a token that's a copy of a creature token you control.)

Create a token that's a copy of target creature you control. If it's your turn, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Draw a card. You may put a land card from your hand onto the battlefield.

Choose one — • Return all creature tokens to their owners' hands. • Return all nontoken creatures to their owners' hands.

{T}: Add {C}. {S}{S}{S}: Faceless Haven becomes a 4/3 creature with vigilance and all creature types until end of turn. It's still a land. ({S} can be paid with one mana from a snow source.)

({T}: Add {G} or {U}.) Rimewood Falls enters the battlefield tapped.

({T}: Add {G}.)

Choose target creature you control and target creature you don't control. If you control three or more snow permanents, the creature you control gets +1/+0 and gains indestructible until end of turn. Then those creatures fight each other. (Each deals damage equal to its power to the other.)

For each creature target player controls, create a token that's a copy of that creature.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Target player draws two cards. Flashback—{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Search your library for a snow land card, put it onto the battlefield tapped, then shuffle.

Create a token that's a copy of target creature you control, except the token has flying and it isn't legendary.

Search your library for a Forest card, put that card onto the battlefield, then shuffle.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Kicker {5} (You may pay an additional {5} as you cast this spell.) Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.