Enslaving Succubus

Flying

You may exert Enslaving Succubus as it attacks.
When you do, if Enslaving Succubus deals 5 or
more combat damage to defending player this turn,
you gain control of that player during that player's
next turn. After that turn, that player takes an extra
turn. (An exerted creature won't untap during your
next untap step. You see all cards that player could
see and make all decisions for the player.)