Imperius

-3: Once This Card Enters The Battlefield. All Light Cards Gain +2/+2 For 6 Turns Starting When This Card Comes Into Play.
-9: Once Activated, This Card Turns All Opponent Players Light Cards Onto Your Side. (Once Only)
-6: If All The Allied Players Cards Get Sent Off The Battlefield. This Card Becomes A Creature Card with 20/20 Stats.