Put 3 loyalty (use counters) on Dack Fayden.
Opponents can attack Dack as though he were you. Any damage he suffers depletes that much loyalty. If Dack has no loyalty, he abandons you. During your turn, you may add 1 loyalty to have target player draw two cards, then choose and discard two cards from hand; or you may spend 2 loyalty to take control of target artifact; or you may spend 6 loyalty, then take control of any permanent you target for the rest of the game. Return all cards to their owners after the game ends.