Freezing Recall

(Colored symbols of a snow instant's mana cost must
be paid by spending mana from a snow permanent.)
Affinity for snow (This spell costs {1} less to cast for
each snow permanent you control.)
Discard X cards, then you may return up to X
snow cards from your graveyard to your hand.
Your snow spells have affinity for snow until end
of turn. Exile Freezing Recall.