Omnion, the Mists

When you cast this spell, create {x} 0/1 blue Mist creature tokens.
{u}{u}, Sacrifice a Mist: Return target non-Mist
permanent to its owner's hand.
{u}{u}, Sacrifice a Mist: Counter target spell.
It is said Omnion knew a secret truth, that all things
were naught but mist.