Yumuna, Power Awakened

: Sacrifice a treasure: deal one damage to any target. Whenever a creature enters the battlefield during an opponent's turn, create a 1/1 burglar.
+1: Until your next upkeep, creatures in your hand have flash and Yumuna becomes a copy of another creature. Then tap that creature. It cannot untap.
-8: Create 3 1/3 poison mask tokens with "Deathtouch. Whenever this deals damage to a player, that player looses the game." until end of your turn.