Luk Ace, Confederate Disciple

Luk Ace can't enter the battlefield if you control
one or more black creatures.
{1}{r}{t}: Luk Ace fights target creature you control
and gains indestructible until the end of turn.
If targeted creature does not die, it gains +4/+4, hexproof, and trample until end of turn.
{u}{x}{t}: Gain control of target nonwhite creature
with converted mana cost X until Luk Ace leaves
the battlefield
"Now that's confederate."