Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Sin, Unending Cataclysm + Umbral Collar Zealot
Produces: Infinite creature ETB, Infinite creature LTB, Infinite death triggers, Infinite creature sacrifice triggers, Infinite surveil, Infinite +1/+1 counters on creatures you control
- Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
- Sin, Unending Cataclysm
- Umbral Collar Zealot
- Color identity
- GWUB
Prerequisites
You control another nontoken creature with base toughness 2 or greater that does not have a -1/-1 counter on it.
Steps
- Activate Umbral Collar Zealot by sacrificing the additional creature.
- When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
- Resolve the Umbral Collar Zealot ability.
- Activate Umbral Collar Zealot by sacrificing Sin.
- When Sin dies, it triggers twice.
- Resolve the first trigger, returning Sin from your graveyard to the battlefield with a -1/-1 counter on it. As Sin enters, remove the -1/-1 counter from the creature sacrificed in step 1, causing Sin to enter with a +1/+1 counter on it instead.
- Resolve the second Sin trigger, putting the counters it had on it when it was sacrificed onto a creature you control and failing to shuffle it into your library as it's no longer in your graveyard.
- Resolve the Umbral Collar Zealot ability from step 4.
- Repeat.
How to execute this combo
The "Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Sin, Unending Cataclysm + Umbral Collar Zealot" combo takes 9 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 creature sacrifice triggers, Infinite surveil, Infinite +1/+1 counters on creatures you control.
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.