Elayne, Daughter Heir

Flash
When Elayne, Daughter Heir blocks, it gets
+0/+3 until end of turn.
{w}{g/u}: Exile target creature until end of turn.
{3}{w}{u}{g}{t}: Destroy target creature an opponent
controls. If that creature is returned to the battlefield
by an instant or sorcery spell, that spell costs {2} more to cast.
Elayne, Daughter Heir may be transformed
into a planeswalker.