Gravespawn Sovereign + Intruder Alarm + Ashnod's Altar

Gravespawn Sovereign
Intruder Alarm
Ashnod's Altar

Requires
Gravespawn Sovereign must be on the battlefield. Intruder Alarm must be on the battlefield. Ashnod's Altar must be on the battlefield. You control at least four other Zombies and an additional nontoken creature.
Steps
  1. Activate Ashnod's Altar by sacrificing a nontoken creature, adding .
  2. Activate Gravespawn Sovereign by tapping five untapped Zombies you control, returning any creature from your graveyard to the battlefield.
  3. The creature enters the battlefield, triggering Intruder Alarm, untapping all creatures.
  4. Repeat.
Results
Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite untap of creatures.

Gisa and Geralf
0.09% of 4347 decks 4 decks
Wilhelt, the Rotcleaver
0.08% of 18702 decks 15 decks
Varina, Lich Queen
0.06% of 6791 decks 4 decks
High Synergy Cards
Gravecrawler
81% of 37 decks +80% synergy
Diregraf Captain
78% of 37 decks +77% synergy
Diregraf Colossus
78% of 37 decks +77% synergy
Rooftop Storm
73% of 37 decks +72% synergy
Top Cards
Cleaver Skaab
70% of 37 decks +70% synergy
Undead Augur
68% of 37 decks +67% synergy
Gisa and Geralf
65% of 37 decks +64% synergy
Headless Rider
62% of 37 decks +61% synergy
Gray Merchant of Asphodel
62% of 37 decks +58% synergy
Necroduality
59% of 37 decks +59% synergy
Empty the Laboratory
57% of 37 decks +56% synergy
Wilhelt, the Rotcleaver
57% of 37 decks +56% synergy
Death Baron
57% of 37 decks +56% synergy
Carrion Feeder
54% of 37 decks +51% synergy
Creatures
Warren Soultrader
75% of 4 decks +71% synergy
Cemetery Reaper
51% of 37 decks +50% synergy
God-Eternal Oketra
50% of 6 decks +49% synergy
Midnight Reaper
49% of 37 decks +47% synergy
Hordewing Skaab
46% of 37 decks +45% synergy
Ghoulcaller Gisa
46% of 37 decks +45% synergy
Mikaeus, the Unhallowed
46% of 37 decks +45% synergy
Cryptbreaker
43% of 37 decks +43% synergy
Lord of the Accursed
43% of 37 decks +42% synergy
Fleshbag Marauder
41% of 37 decks +38% synergy
Havengul Lich
38% of 37 decks +37% synergy
Plague Belcher
38% of 37 decks +37% synergy
Champion of the Perished
38% of 37 decks +37% synergy
Geralf, Visionary Stitcher
35% of 37 decks +35% synergy
Tomb Tyrant
35% of 37 decks +35% synergy
Vengeful Dead
32% of 37 decks +32% synergy
Overcharged Amalgam
32% of 37 decks +32% synergy
Gleaming Overseer
32% of 37 decks +32% synergy
Undead Warchief
32% of 37 decks +32% synergy
Grimgrin, Corpse-Born
30% of 37 decks +29% synergy
Archghoul of Thraben
30% of 37 decks +29% synergy
Feral Ghoul
27% of 11 decks +26% synergy
Mirkwood Bats
27% of 22 decks +21% synergy
Undead Alchemist
27% of 37 decks +27% synergy
Noxious Ghoul
27% of 37 decks +27% synergy
Poppet Stitcher
27% of 37 decks +27% synergy
Lord of the Undead
27% of 37 decks +26% synergy
The Scarab God
27% of 37 decks +26% synergy
Sidisi, Undead Vizier
27% of 37 decks +26% synergy
Ravenous Rotbelly
24% of 37 decks +24% synergy
Corpse Augur
24% of 37 decks +24% synergy
Relentless Dead
24% of 37 decks +24% synergy
Forgotten Creation
24% of 37 decks +24% synergy
Murderous Rider
24% of 37 decks +23% synergy
Vizier of the Scorpion
22% of 37 decks +21% synergy
Eternal Skylord
22% of 37 decks +21% synergy
Syr Konrad, the Grim
22% of 37 decks +17% synergy
Drivnod, Carnage Dominus
20% of 25 decks +18% synergy
Lich Lord of Unx
19% of 37 decks +19% synergy
Graveborn Muse
19% of 37 decks +19% synergy
Acererak the Archlich
19% of 37 decks +19% synergy
Vile Entomber
19% of 37 decks +18% synergy
Grave Titan
19% of 37 decks +18% synergy
Titan of Littjara
17% of 18 decks +16% synergy
Rot Hulk
16% of 37 decks +16% synergy
Unbreathing Horde
16% of 37 decks +16% synergy
Noosegraf Mob
16% of 37 decks +16% synergy
Shepherd of Rot
16% of 37 decks +16% synergy
Liliana's Standard Bearer
16% of 37 decks +16% synergy
Phyrexian Ghoul
14% of 37 decks +13% synergy
Instants
Swords to Plowshares
50% of 6 decks +21% synergy
Counterspell
30% of 37 decks +9% synergy
Entomb
24% of 37 decks +21% synergy
Dark Ritual
24% of 37 decks +13% synergy
Rise of the Dread Marn
22% of 37 decks +21% synergy
Village Rites
22% of 37 decks +16% synergy
Vampiric Tutor
22% of 37 decks +12% synergy
Negate
22% of 37 decks +10% synergy
Plumb the Forbidden
19% of 37 decks +17% synergy
Go for the Throat
19% of 37 decks +15% synergy
Lazotep Plating
16% of 37 decks +15% synergy
Frantic Search
16% of 37 decks +10% synergy
Cyclonic Rift
16% of 37 decks +2% synergy
Tragic Slip
14% of 37 decks +12% synergy
Mana Drain
14% of 37 decks +6% synergy
Brainstorm
14% of 37 decks +3% synergy
Malakir Rebirth
11% of 37 decks +6% synergy
Deadly Rollick
11% of 37 decks +5% synergy
Fierce Guardianship
11% of 37 decks +2% synergy
An Offer You Can't Refuse
9% of 32 decks -1% synergy
Aetherspouts
8% of 37 decks +7% synergy
Drown in the Loch
8% of 37 decks +6% synergy
Fact or Fiction
8% of 37 decks +5% synergy
Infernal Grasp
8% of 37 decks +4% synergy
Arcane Denial
8% of 37 decks -1% synergy
Sorceries
Zombie Apocalypse
51% of 37 decks +51% synergy
Feed the Swarm
41% of 37 decks +31% synergy
Reanimate
35% of 37 decks +27% synergy
Distant Melody
32% of 37 decks +30% synergy
Diabolic Intent
32% of 37 decks +28% synergy
Dread Summons
30% of 37 decks +29% synergy
Army of the Damned
30% of 37 decks +29% synergy
Victimize
30% of 37 decks +24% synergy
Lich-Knights' Conquest
29% of 17 decks +28% synergy
Dread Return
24% of 37 decks +22% synergy
Dark Salvation
19% of 37 decks +19% synergy
Demonic Tutor
19% of 37 decks +7% synergy
Ghouls' Night Out
16% of 37 decks +16% synergy
Buried Alive
16% of 37 decks +13% synergy
Diabolic Tutor
14% of 37 decks +10% synergy
Necrotic Hex
11% of 37 decks +10% synergy
Persist
11% of 37 decks +10% synergy
Patriarch's Bidding
11% of 37 decks +9% synergy
Living Death
11% of 37 decks +8% synergy
Toxic Deluge
11% of 37 decks +2% synergy
Ghoulcaller's Chant
8% of 37 decks +8% synergy
From Under the Floorboards
8% of 37 decks +8% synergy
Exhume
8% of 37 decks +8% synergy
Ravenform
8% of 37 decks +7% synergy
Grim Tutor
8% of 37 decks +6% synergy
Sign in Blood
8% of 37 decks +3% synergy
Ponder
8% of 37 decks +2% synergy
Utility Artifacts
Phyrexian Altar
51% of 37 decks +47% synergy
Altar of Dementia
35% of 37 decks +32% synergy
Skullclamp
24% of 37 decks +12% synergy
Wand of Orcus
22% of 37 decks +21% synergy
Herald's Horn
22% of 37 decks +15% synergy
Pyre of Heroes
14% of 37 decks +13% synergy
Wayfarer's Bauble
14% of 37 decks +3% synergy
Nim Deathmantle
11% of 37 decks +10% synergy
Altar of the Brood
11% of 37 decks +10% synergy
Bontu's Monument
11% of 37 decks +9% synergy
Expedition Map
11% of 37 decks +7% synergy
Bolas's Citadel
11% of 37 decks +6% synergy
Lightning Greaves
11% of 37 decks -15% synergy
Blasting Station
8% of 37 decks +8% synergy
Mindcrank
8% of 37 decks +6% synergy
Alhammarret's Archive
8% of 37 decks +6% synergy
Swiftfoot Boots
8% of 37 decks -20% synergy
Enchantments
Endless Ranks of the Dead
51% of 37 decks +50% synergy
Dreadhorde Invasion
35% of 37 decks +34% synergy
Grave Pact
24% of 37 decks +22% synergy
Kindred Discovery
22% of 37 decks +18% synergy
Virtue of Persistence
20% of 15 decks +18% synergy
Open the Graves
19% of 37 decks +18% synergy
The Meathook Massacre
19% of 37 decks +16% synergy
Liliana's Mastery
16% of 37 decks +16% synergy
Reflections of Littjara
16% of 37 decks +14% synergy
Bastion of Remembrance
16% of 37 decks +13% synergy
Phyrexian Arena
14% of 37 decks +6% synergy
Faces of the Past
11% of 37 decks +11% synergy
Necromancer's Stockpile
11% of 37 decks +11% synergy
Zombie Infestation
11% of 37 decks +11% synergy
Black Market
11% of 37 decks +8% synergy
Rhystic Study
11% of 37 decks -3% synergy
Call to the Grave
8% of 37 decks +8% synergy
Graf Harvest
8% of 37 decks +8% synergy
Curse of the Restless Dead
8% of 37 decks +8% synergy
Tortured Existence
8% of 37 decks +7% synergy
Animate Dead
8% of 37 decks +3% synergy
Planeswalkers
Liliana, Death's Majesty
32% of 37 decks +32% synergy
Liliana, Dreadhorde General
22% of 37 decks +20% synergy
Liliana, Untouched by Death
19% of 37 decks +19% synergy
Utility Lands
Bojuka Bog
46% of 37 decks +30% synergy
Cabal Coffers
41% of 37 decks +35% synergy
Urborg, Tomb of Yawgmoth
35% of 37 decks +25% synergy
Mortuary Mire
27% of 37 decks +24% synergy
Field of the Dead
27% of 37 decks +24% synergy
Reliquary Tower
27% of 37 decks -2% synergy
Unholy Grotto
24% of 37 decks +24% synergy
Crypt of Agadeem
19% of 37 decks +18% synergy
Phyrexian Tower
16% of 37 decks +12% synergy
Nykthos, Shrine to Nyx
11% of 37 decks +5% synergy
Mystic Sanctuary
11% of 37 decks +5% synergy
Takenuma, Abandoned Mire
9% of 35 decks +3% synergy
Cabal Stronghold
8% of 37 decks +6% synergy
Witch's Cottage
8% of 37 decks +6% synergy
Castle Locthwain
8% of 37 decks +5% synergy
Temple of the False God
8% of 37 decks -2% synergy
Mana Artifacts
Sol Ring
95% of 37 decks +10% synergy
Arcane Signet
86% of 37 decks +15% synergy
Talisman of Dominance
65% of 37 decks +57% synergy
Dimir Signet
57% of 37 decks +49% synergy
Orzhov Signet
50% of 6 decks +44% synergy
Crowded Crypt
43% of 37 decks +42% synergy
Commander's Sphere
27% of 37 decks +11% synergy
Thought Vessel
22% of 37 decks +5% synergy
Sky Diamond
14% of 37 decks +11% synergy
Mind Stone
14% of 37 decks -4% synergy
Charcoal Diamond
11% of 37 decks +8% synergy
Fellwar Stone
11% of 37 decks -10% synergy
Lands
Command Tower
89% of 37 decks +16% synergy
Sunken Hollow
78% of 37 decks +70% synergy
Choked Estuary
59% of 37 decks +55% synergy
Watery Grave
59% of 37 decks +49% synergy
Path of Ancestry
57% of 37 decks +36% synergy
Glacial Fortress
50% of 6 decks +45% synergy
Hallowed Fountain
50% of 6 decks +41% synergy
Drowned Catacomb
49% of 37 decks +42% synergy
Dimir Aqueduct
41% of 37 decks +36% synergy
Myriad Landscape
41% of 37 decks +20% synergy
Tainted Isle
38% of 37 decks +35% synergy
Darkwater Catacombs
38% of 37 decks +34% synergy
Temple of Deceit
38% of 37 decks +34% synergy
Unclaimed Territory
35% of 37 decks +30% synergy
Shipwreck Marsh
32% of 37 decks +28% synergy
Undercity Sewers
30% of 10 decks +27% synergy
Underground River
30% of 37 decks +25% synergy
Evolving Wilds
30% of 37 decks +9% synergy
Terramorphic Expanse
27% of 37 decks +11% synergy
Exotic Orchard
27% of 37 decks -8% synergy
Secluded Courtyard
26% of 35 decks +21% synergy
Morphic Pool
24% of 37 decks +18% synergy
Polluted Delta
24% of 37 decks +13% synergy
Ice Tunnel
22% of 37 decks +21% synergy
Sunken Ruins
19% of 37 decks +18% synergy
Clearwater Pathway
16% of 37 decks +14% synergy
Fetid Pools
14% of 37 decks +12% synergy
Cavern of Souls
14% of 37 decks +7% synergy
Port of Karfell
11% of 37 decks +10% synergy
Darkslick Shores
11% of 37 decks +10% synergy
Dismal Backwater
11% of 37 decks +9% synergy
Fabled Passage
11% of 37 decks +2% synergy
Contaminated Aquifer
10% of 29 decks +9% synergy
Bloodstained Mire
8% of 37 decks -2% synergy
Flooded Strand
8% of 37 decks -2% synergy
Scalding Tarn
8% of 37 decks -3% synergy
Marsh Flats
8% of 37 decks -3% synergy
Verdant Catacombs
8% of 37 decks -3% synergy
Misty Rainforest
8% of 37 decks -4% synergy