Sejuani, Fury of The North

Trample, Iceborn(This creature is a snow creature)

Artic Assault — {s}{s}: Sejuani, Fury of The North gets +1/+0 and First Strike until end of turn

Winter's Wrath — Whenever you deal combat damage to a creature it gets -1/-0

Warmother — Snow creatures you control have
+2/+2, Warrior creatures you control have Iceborn