Alien Oracle

Flash
Haste, multidimensional (This creature may be
used by an identical player as if that player controls
it and as though it existed on that player's battlefield.
When that happens, the creature is considered to exist
in both otherworlds until end of turn.)
{t}: Add one mana of any one color. Spend this
mana only to cast an Otherworldly spell.
{g/u}: Return Alien Oracle to its owner's hand.