The Amulet of Chaosfang

Roulette(At the beginning of your upkeep, target opponent at random gains control of The Amulet of Chaosfang.)
Creatures you control get +2/-2
Whenever equipped creature attacks, defending player gains control of The Amulet of Chaosfang.
Equip {b/r}({b/r}:Attach to target creature you control. Equip only as a sorcery.