Eirdu, Carrier of Dawn
Umbral Collar Zealot
Vengeful Vampire

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Eirdu as Isilu, Carrier of Twilight on the battlefield and Vengeful Vampire without a +1/+1 counter on it on the battlefield).

   Steps

How does this combo work?
1
Activate Umbral Collar Zealot by sacrificing Vengeful Vampire
2
When Vengeful Vampire dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3
Activate Umbral Collar Zealot by sacrificing Vengeful Vampire
4
When Vengeful Vampire dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5
Resolve both Umbral Collar Zealot abilities from step 1 and 3.
6
Repeat.

   Results

What do I get from this combo?
Infinite +1/+1 counters on a creature
Infinite ETB
Infinite LTB
Infinite death triggers
Infinite sacrifice triggers
Infinite surveil
Eirdu, Carrier of Dawn
0.4%inclusion16 decks4.22K decks
New Cards
Eclipsed Steppe
50%inclusion1 decks2 decks
32%synergy
Splinter's Technique
18%inclusion2 decks11 decks
16%synergy
High Synergy Cards
Evernight Shade
94%inclusion15 decks16 decks
94%synergy
Geralf's Messenger
94%inclusion15 decks16 decks
93%synergy
Sightless Ghoul
88%inclusion14 decks16 decks
87%synergy
Butcher Ghoul
88%inclusion14 decks16 decks
87%synergy
Hancock, Ghoulish Mayor
75%inclusion12 decks16 decks
75%synergy
Viscera Seer
94%inclusion15 decks16 decks
73%synergy
Luminous Broodmoth
75%inclusion12 decks16 decks
67%synergy
Bartolomé del Presidio
81%inclusion13 decks16 decks
65%synergy
Bastion of Remembrance
81%inclusion13 decks16 decks
63%synergy
Cruel Celebrant
88%inclusion14 decks16 decks
62%synergy
Top Cards
Swords to Plowshares
94%inclusion15 decks16 decks
30%synergy
Blood Artist
88%inclusion14 decks16 decks
57%synergy
Elas il-Kor, Sadistic Pilgrim
88%inclusion14 decks16 decks
53%synergy
Path to Exile
81%inclusion13 decks16 decks
32%synergy
Pitiless Plunderer
75%inclusion12 decks16 decks
59%synergy
Ashnod's Altar
75%inclusion12 decks16 decks
57%synergy
Zulaport Cutthroat
75%inclusion12 decks16 decks
53%synergy
Corpse Knight
69%inclusion11 decks16 decks
57%synergy
Skullclamp
69%inclusion11 decks16 decks
42%synergy
Mikaeus, the Unhallowed
63%inclusion10 decks16 decks
60%synergy
Creatures
Carrion Feeder
63%inclusion10 decks16 decks
54%synergy
Demonlord of Ashmouth
56%inclusion9 decks16 decks
56%synergy
Solemn Simulacrum
56%inclusion9 decks16 decks
41%synergy
Vizier of Remedies
50%inclusion8 decks16 decks
49%synergy
Grim Haruspex
50%inclusion8 decks16 decks
41%synergy
Morbid Opportunist
50%inclusion8 decks16 decks
38%synergy
Teysa Karlov
50%inclusion8 decks16 decks
34%synergy
Treacherous Pit-Dweller
44%inclusion7 decks16 decks
44%synergy
Woe Strider
44%inclusion7 decks16 decks
40%synergy
Vengeful Bloodwitch
44%inclusion7 decks16 decks
38%synergy
Marionette Apprentice
44%inclusion7 decks16 decks
34%synergy
Elenda, the Dusk Rose
44%inclusion7 decks16 decks
24%synergy
Rhys, the Evermore
38%inclusion5 decks13 decks
36%synergy
Junji, the Midnight Sky
38%inclusion6 decks16 decks
34%synergy
Syr Konrad, the Grim
38%inclusion6 decks16 decks
29%synergy
Warren Soultrader
38%inclusion6 decks16 decks
28%synergy
Yahenni, Undying Partisan
38%inclusion6 decks16 decks
28%synergy
Zack Fair
31%inclusion5 decks16 decks
28%synergy
Midnight Reaper
31%inclusion5 decks16 decks
25%synergy
Gray Merchant of Asphodel
31%inclusion5 decks16 decks
20%synergy
Esper Sentinel
31%inclusion5 decks16 decks
13%synergy
Endling
25%inclusion4 decks16 decks
25%synergy
Scholar of New Horizons
25%inclusion4 decks16 decks
22%synergy
Bitterbloom Bearer
25%inclusion4 decks16 decks
20%synergy
Spirited Companion
25%inclusion4 decks16 decks
20%synergy
Selfless Spirit
25%inclusion4 decks16 decks
14%synergy
Braids, Arisen Nightmare
25%inclusion4 decks16 decks
13%synergy
Welcoming Vampire
25%inclusion4 decks16 decks
11%synergy
Emptiness
19%inclusion3 decks16 decks
17%synergy
Solitude
19%inclusion3 decks16 decks
16%synergy
Yawgmoth, Thran Physician
19%inclusion3 decks16 decks
12%synergy
Teysa, Orzhov Scion
19%inclusion3 decks16 decks
10%synergy
Reassembling Skeleton
19%inclusion3 decks16 decks
10%synergy
Sun Titan
19%inclusion3 decks16 decks
7%synergy
Instants
Despark
50%inclusion8 decks16 decks
19%synergy
Deadly Dispute
44%inclusion7 decks16 decks
22%synergy
Village Rites
44%inclusion7 decks16 decks
22%synergy
Corrupted Conviction
38%inclusion6 decks16 decks
27%synergy
Mortify
38%inclusion6 decks16 decks
15%synergy
Undying Evil
31%inclusion5 decks16 decks
31%synergy
Generous Gift
31%inclusion5 decks16 decks
8%synergy
Dark Ritual
31%inclusion5 decks16 decks
7%synergy
Anguished Unmaking
31%inclusion5 decks16 decks
-10%synergy
Plumb the Forbidden
25%inclusion4 decks16 decks
19%synergy
Fracture
25%inclusion4 decks16 decks
5%synergy
Flare of Fortitude
19%inclusion3 decks16 decks
12%synergy
Sorceries
Damn
56%inclusion9 decks16 decks
24%synergy
Victimize
44%inclusion7 decks16 decks
26%synergy
Austere Command
31%inclusion5 decks16 decks
14%synergy
Night's Whisper
31%inclusion5 decks16 decks
13%synergy
Diabolic Tutor
25%inclusion4 decks16 decks
19%synergy
Beseech the Queen
19%inclusion3 decks16 decks
18%synergy
Diabolic Intent
19%inclusion3 decks16 decks
9%synergy
Vindicate
19%inclusion3 decks16 decks
7%synergy
Reanimate
19%inclusion3 decks16 decks
3%synergy
Sign in Blood
19%inclusion3 decks16 decks
1%synergy
Utility Artifacts
Altar of Dementia
44%inclusion7 decks16 decks
39%synergy
Phyrexian Altar
31%inclusion5 decks16 decks
20%synergy
Swiftfoot Boots
25%inclusion4 decks16 decks
0%synergy
Enchantments
Solemnity
63%inclusion10 decks16 decks
60%synergy
Cathars' Crusade
56%inclusion9 decks16 decks
52%synergy
Thran Vigil
44%inclusion7 decks16 decks
43%synergy
Phyrexian Arena
38%inclusion6 decks16 decks
9%synergy
The Meathook Massacre
25%inclusion4 decks16 decks
15%synergy
Grave Pact
19%inclusion3 decks16 decks
10%synergy
Utility Lands
Bojuka Bog
50%inclusion8 decks16 decks
6%synergy
Vault of the Archangel
25%inclusion4 decks16 decks
-8%synergy
Phyrexian Tower
19%inclusion3 decks16 decks
2%synergy
Mana Artifacts
Sol Ring
100%inclusion16 decks16 decks
16%synergy
Arcane Signet
81%inclusion13 decks16 decks
1%synergy
Orzhov Signet
69%inclusion11 decks16 decks
14%synergy
Talisman of Hierarchy
56%inclusion9 decks16 decks
3%synergy
Fellwar Stone
44%inclusion7 decks16 decks
23%synergy
Thought Vessel
31%inclusion5 decks16 decks
17%synergy
Mind Stone
31%inclusion5 decks16 decks
8%synergy
Lands
Command Tower
88%inclusion14 decks16 decks
1%synergy
Isolated Chapel
81%inclusion13 decks16 decks
15%synergy
Fetid Heath
75%inclusion12 decks16 decks
34%synergy
Tainted Field
75%inclusion12 decks16 decks
24%synergy
Caves of Koilos
63%inclusion10 decks16 decks
5%synergy
Orzhov Basilica
56%inclusion9 decks16 decks
16%synergy
Shineshadow Snarl
56%inclusion9 decks16 decks
15%synergy
Temple of Silence
50%inclusion8 decks16 decks
10%synergy
Godless Shrine
44%inclusion7 decks16 decks
-7%synergy
Desolate Mire
38%inclusion6 decks16 decks
21%synergy
Exotic Orchard
38%inclusion6 decks16 decks
12%synergy
Shattered Sanctum
38%inclusion6 decks16 decks
1%synergy
Brightclimb Pathway
25%inclusion4 decks16 decks
-2%synergy
Marsh Flats
25%inclusion4 decks16 decks
-5%synergy
Vault of Champions
25%inclusion4 decks16 decks
-15%synergy
Prismatic Vista
19%inclusion3 decks16 decks
13%synergy
Concealed Courtyard
19%inclusion3 decks16 decks
-2%synergy
Shadowy Backstreet
19%inclusion3 decks16 decks
-4%synergy
Bleachbone Verge
19%inclusion3 decks16 decks
-5%synergy