Eirdu, Carrier of Dawn
Sin, Unending Cataclysm
Umbral Collar Zealot

  Played with this combo

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Eirdu as Isilu, Carrier of Twilight on the battlefield and Sin without a -1/-1 counter on it on the battlefield).
You control another nontoken creature with base toughness 2 or greater that does not have a -1/-1 counter on it.

   Steps

How does this combo work?
1
Activate Umbral Collar Zealot by sacrificing the additional creature.
2
When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3
Resolve the Umbral Collar Zealot ability.
4
Activate Umbral Collar Zealot by sacrificing Sin.
5
When Sin dies, it triggers twice.
6
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.
7
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.
8
Resolve the Umbral Collar Zealot ability from step 4.
9
Repeat.

   Results

What do I get from this combo?
Infinite ETB
Infinite LTB
Infinite death triggers
Infinite sacrifice triggers
Infinite surveil
Infinite +1/+1 counters on creatures you control

  Combo Metadata

2
DECKS
0.00%
OF 221823 ELIGIBLE DECKS
Rank 41254
MOST PLAYED OF 54045 COMBOS

{ }  Commander Bracket Information

In which Commander Bracket(s) am I allowed to play this combo?
1-2

Exhibition and Core

(no 2-card combos)
Any combos that require three or more cards are allowed
3

Upgraded

(no early game 2-card combos)
Any combos that require 3 or more cards are allowed
4-5

Optimized and CEDH

(all combos are allowed)
All combos are allowed.
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