Freya, Cryomancer of Izzet

Hexproof (This creature can't be the target of spells
or abilities your opponents control.)
{t}: tap target creature an opponent controls. It
doesn't untap during its controller's next untap
step.
Each instant and sorcery spell you cast has
replicate. The replicate cost is {u/r}. (When you cast
it, copy it for each time you paid its replicate cost. You
may choose new targets for the copies.)
({u/r} can be paid with either {u} or {r}.)