Taken Blight

At the beginning of your upkeep, if a creature
you control was phased out before this turn, it
becomes a Taken subtype in addition to its other
types.
At the beginning of your end step, you may
choose one creature you control. If you do, it
phases out.
{t}: Add {c}{c} to your mana pool. Only use it to
cast a Taken spell.