Cursed Phantom

Flash, first strike, vigilance, exalted (Whenever a
creature you control attacks alone, that creature gets
+1/+1 until end of turn.)
{1}{w}{w}{w}: Put Cursed Phantom onto the
battlefield from your hand. Then, each other
nonland permanent phases out. Until Cursed
Phantom leaves the battlefield, they can't phase
in. (Treat them and anything attached to
them as though they don't exist.)