Boreal Shelf

Flying 1S: Snow creatures you control get +1/+1 until end of turn. (S can be paid with one mana from a snow source.)

(T: Add R.)

Reach (This creature can block creatures with flying.) Whenever this creature blocks a creature with flying, put a +1/+1 counter on this creature at end of combat.

Destroy target artifact or land. Recover RR (When a creature is put into your graveyard from the battlefield, you may pay RR. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)

Destroy target Plains or Island. Cryoclasm deals 3 damage to that land's controller.

Snow landwalk (This creature can't be blocked as long as defending player controls a snow land.) S: Regenerate this creature. (S can be paid with one mana from a snow source.)

Skred deals damage to target creature equal to the number of snow permanents you control.

Flying Prevent all damage that would be dealt to this creature by creatures with first strike.