IX Cerchio, Traditori

Hexproof, Indestructible, can't be countered
(Can't be exiled, sacrificed or returned to its owners
hand or library. Players can't gain life or pay life for
spell/effects other than this card.)
Enchant all players (all players control this card.)
Pay {6}: Gain control of target permanent.
During your upkeep, you may pay 10 life to
exchange life total with another player; you may
then pay 5 to destroy target non-land permanent
and/or gain 10 life to add {6} mana to your mana
pool.