Zerolko, Princess of Glacia

Altered (This spell must be cast using void mana)
At the beginning of your upkeep you may pay {u}. If you do, create a 0/1 blue Elemental creature token with shroud.
Sacrifice 3 Elemental creatures,{g}, {t}: Target player can't cast spells during his or her next turn.
Her voice echos within the midst of the war
beneath the ice.