FlyingWhenever Zur the Enchanter attacks, you may search your library for an enchantment card with mana value 3 or less, put it onto the battlefield, then shuffle.
FlyingRimefeather Owl's power and toughness are each equal to the number of snow permanents on the battlefield.: Put an ice counter on target permanent.Permanents with ice counters on them are snow.
TrampleCumulative upkeep or (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)When Arctic Nishoba dies, you gain 2 life for each age counter on it.
Whenever Ohran Viper deals combat damage to a creature, destroy that creature at end of combat.Whenever Ohran Viper deals combat damage to a player, you may draw a card.
Cumulative upkeep or (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)When Jötun Owl Keeper dies, create a 1/1 white Bird creature token with flying for each age counter on it.
TrampleWhenever Rimehorn Aurochs attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.: Target creature blocks target creature this turn if able. ( can be paid with one mana from a snow source.)
Enchant creatureWhen Shape of the Wiitigo enters, put six +1/+1 counters on enchanted creature.At the beginning of your upkeep, put a +1/+1 counter on enchanted creature if it attacked or blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it.
Destroy target artifact or land.Recover (When a creature is put into your graveyard from the battlefield, you may pay . If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)
