Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Altar of Dementia + Gleeful Arsonist
Produces: Infinite creature ETB, Infinite creature LTB, Infinite death triggers, Infinite mill, Infinite creature sacrifice triggers, Infinite self-mill
- Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
- Altar of Dementia
- Gleeful Arsonist
- Color identity
- RWB
Steps
- Activate Altar of Dementia by sacrificing Gleeful Arsonist
- When Gleeful Arsonist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
- Activate Altar of Dementia by sacrificing Gleeful Arsonist
- When Gleeful Arsonist dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
- Resolve both Altar of Dementia abilities from step 1 and 3.
- Repeat.
How to execute this combo
The "Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Altar of Dementia + Gleeful Arsonist" combo takes 6 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite creature ETB, Infinite creature LTB, Infinite death triggers, Infinite mill, Infinite creature sacrifice triggers, Infinite self-mill.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.