W.D. Gaster

Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)
{1}{p/u} Target creature phases out.
{2}{p/b} Target creature doesn't phase in during it's controller's next untap step.
"Entry Number 17: Dark, Darker, Yet Darker..."