Glacial Embrace

(Colored symbols of a snow sorcery's mana cost must
be paid by spending mana from a snow permanent.)
Put an ice counter on up to one target nonsnow creature if {w} was paid to cast this spell and on
up to one another target nonsnow creature if {b} was paid to cast this spell. (Permanents with ice counters on them are snow.)
Each player sacrifices two nonsnow creatures.