Vraska, of House Kos

: You may search your deck for Runus Kos, Avenger reveal it and place it in your hand
+2: Until your next turn, whenever a creature deals combat damage to Vraska, of House Dimir, sacrifice it
-9: Summon 3/3 Assassin Tokens named Guardians of Kos with menace, equal to the number of creatures your opponent controls