Coldsnap

Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for ...

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

At the beginning of each end step, each player gains control of all nontoken permanents they own.

{T}: Add {C}.

{S}: Boreal Centaur gets +1/+1 until end of turn. Activate only once each turn. ({S} can be paid with one mana from a snow source.)

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. ...

Trample Cumulative upkeep {G} or {W} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its u...

You may exile two green cards from your hand rather than pay this spell's mana cost. Allosaurus Rider's power and toughness are each equal to 1 pl...

{S}: Thermopod gains haste until end of turn. ({S} can be paid with one mana from a snow source.) Sacrifice a creature: Add {R}.

Flying, first strike Whenever Kjeldoran Gargoyle deals damage, you gain that much life.

Flying, vigilance {T}: When target creature other than Adarkar Valkyrie dies this turn, return that card to the battlefield under your control.