Occult Emporium

Occult Emporium enters the battlefield tapped.
{t}: Add {w} or {b}.
{w/b}{t}: Target player chosen at random
gains 1 life, then target player chosen at
random loses 1 life.
"They trade with life and death. If you're unsure of
what that entails, it's better to not get involved."
-Wayfaring Shaman