Kakashi, Copy Master

Flash
Spells you cast have Flash
{u}{u}{2} Copy the target spell you don't control (Activate once per turn)
{w}{2} Exile target permanent, return it to the battlefield (Activate once per turn)
{w}{u}{b}{x} Exile target Creature, Artifact, Enchantment, instant or Sorcery With
converted mana cost equal to X
(Activate once per turn)