Mirala, Humanity's Bane

+2: Target cultist gets indestructible and deathtouch until end of turn. (Activate as an instant.)
-3: Cultleaders you control can't die until your next turn. (Activate as an instant.)
-10: Mirala turns into a 4/4 creature with Hivemind 2 and "When this creature deals combat damage to a player, you gain 10 life" until end of turn.