Mammon, Exactor of Defectors

Flying
During each player's turn, that player may pay 5
life, then target any equipment or aura in play
and equip or enchant it to any target.
At the beginning of each end step, if a player
dealt combat damage to another player this turn,
that player gains that much life.
Extort (Whenever you cast a spell, you may pay {w/b}. If you do, each opponent loses 1 life and you gain
that much life.)