Ethereal Infiltrator

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.)
{u}: Ethereal Infiltrator phases out (While it's
phased out, it's treated as though it doesn't exist. It
phases in before its controller untaps during their
next untap step.)
"You don't see me, now you see me!"