Domination Seer

: Blue, black, and red creatures you control gain +2/+2 while white and green creatures you don't control gain -2/-2.
+1: Summon a 3/3 red dragon creature token with flying, a 5/5 black demon creature token, and a 4/4 blue kraken creature token with menace.
-7: Destroy X target creatures, were X is the number of blue, black, and red creatures that are on the battlefield and in the graveyard.