This devastating loop relies on an infinite ping-pong of damage between your creatures, fueled by the fact that Boromir, Warden of the Tower grants your board indestructible so they can survive the carnage. When you deal initial damage to Red Hulk, its enrage ability triggers to place a +1/+1 counter and hurl damage at Ill-Tempered Loner // Howlpack Avenger. That incoming damage immediately triggers Ill-Tempered Loner // Howlpack Avenger's ability to fire right back at Red Hulk, making the enrage trigger go off all over again. Because Red Hulk grows a larger +1/+1 counter with every single iteration, this self-sustaining cycle rapidly builds to lethal, game-ending damage.