Volkisha, Great Ice-Lord

Flying
Whenever an opponents casts a spell with a single
target, counter that spell unless they pay {2}.
{2}{s}{s},{t}: Create a blue Aura enchantment
token named Ice Cage attached to target creature.
The token has enchant creature, "Enchanted
creature can't attack or block, and its activated abilities can't be activated," and "When
enchanted creature becomes the target of a
spell or ability, destroy Ice Cage."