Jeff Nentrup

Rimewind necromancers caught travelers in mystical blizzards then trapped their spirits in the mist of their final frozen breaths.

Chilling Shade

Flying
{Si}: Chilling Shade gets +1/+1 until end of turn. ({Si} can be paid with one mana from a snow permanent.)

Flying
{S}: This creature gets +1/+1 until end of turn. ({S} can be paid with one mana from a snow source.)

The unfortunates so transformed hungered not for flesh, but for warmth.

Rime Transfusion

Enchant creature
Enchanted creature gets +2/+1 and has "{S}: This creature can't be blocked this turn except by snow creatures." ({S} can be paid with one mana from a snow source.)