Prowling Geistcatcher + Felidar Guardian + Ashnod's Altar

Prowling Geistcatcher
Felidar Guardian
Ashnod's Altar

Requires
Prowling Geistcatcher must be on the battlefield. Felidar Guardian must be in hand. Ashnod's Altar must be on the battlefield. Mana needed: 3
Steps
  1. Cast Felidar Guardian by paying 3.
  2. Felidar Guardian enters the battlefield, triggering its ability, targeting Prowling Geistcatcher.
  3. Holding priority, activate Ashnod's Altar by sacrificing Felidar Guardian, adding .
  4. Prowling Geistcatcher triggers, exiling Felidar Guardian from your graveyard.
  5. Resolve the Felidar Guardian trigger from 2, blinking Prowling Geistcatcher.
  6. Prowling Geistcatcher leaves the battlefield, returning Felidar Guardian from exile to the battlefield.
  7. Repeat from step 2.
Results
Infinite blinking. Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Alesha, Who Smiles at Death
0.18% of 6117 decks 11 decks
Karador, Ghost Chieftain
0.05% of 5612 decks 3 decks
Malik, Grim Manipulator
0.07% of 3016 decks 2 decks
Kenrith, the Returned King
0.01% of 23873 decks 2 decks
Nikara, Lair Scavenger // Yannik, Scavenging Sentinel
0.22% of 921 decks 2 decks
Bane, Lord of Darkness
0.05% of 2129 decks 1 decks
Firja, Judge of Valor
0.08% of 1305 decks 1 decks
Livio, Oathsworn Sentinel // Nadier, Agent of the Duskenel
2.78% of 36 decks 1 decks
Minthara, Merciless Soul
0.03% of 3778 decks 1 decks
Ketramose, the New Dawn
0.02% of 4332 decks 1 decks
Rasaad yn Bashir // Agent of the Iron Throne
14.29% of 7 decks 1 decks
Shilgengar, Sire of Famine
0.02% of 5502 decks 1 decks
Queza, Augur of Agonies
0.01% of 6948 decks 1 decks
New Cards
Mardu Devotee
100% of 1 decks +99% synergy
Mardu Siegebreaker
100% of 1 decks +92% synergy
High Synergy Cards
Karmic Guide
82% of 28 decks +78% synergy
Kiki-Jiki, Mirror Breaker
80% of 15 decks +77% synergy
Reveillark
64% of 28 decks +63% synergy
Goblin Bombardment
67% of 15 decks +60% synergy
Fiend Hunter
61% of 28 decks +59% synergy
Altar of Dementia
61% of 28 decks +58% synergy
Saffi Eriksdotter
57% of 7 decks +56% synergy
Sakura-Tribe Elder
71% of 7 decks +53% synergy
Viscera Seer
61% of 28 decks +52% synergy
Eternal Witness
71% of 7 decks +52% synergy
Top Cards
Faithless Looting
67% of 15 decks +50% synergy
Swords to Plowshares
61% of 28 decks -2% synergy
Phyrexian Altar
54% of 28 decks +50% synergy
Imperial Recruiter
53% of 15 decks +48% synergy
Sun Titan
50% of 28 decks +41% synergy
Solemn Simulacrum
43% of 28 decks +29% synergy
Seasoned Pyromancer
40% of 15 decks +40% synergy
Cathartic Reunion
40% of 15 decks +37% synergy
Buried Alive
39% of 28 decks +34% synergy
Animate Dead
39% of 28 decks +30% synergy
Game Changers
Demonic Tutor
39% of 28 decks +18% synergy
Smothering Tithe
14% of 28 decks -10% synergy
Drannith Magistrate
11% of 28 decks +5% synergy
Vampiric Tutor
11% of 28 decks -7% synergy
Creatures
Renegade Rallier
43% of 7 decks +42% synergy
Satyr Wayfinder
43% of 7 decks +41% synergy
Old Stickfingers
43% of 7 decks +40% synergy
Spore Frog
43% of 7 decks +40% synergy
Farhaven Elf
43% of 7 decks +39% synergy
Skull Prophet
43% of 7 decks +38% synergy
Wood Elves
43% of 7 decks +37% synergy
Avacyn's Pilgrim
43% of 7 decks +29% synergy
Llanowar Elves
43% of 7 decks +22% synergy
Zulaport Cutthroat
39% of 28 decks +30% synergy
Carrion Feeder
36% of 28 decks +31% synergy
Pitiless Plunderer
36% of 28 decks +28% synergy
Marionette Apprentice
35% of 20 decks +30% synergy
Master of Cruelties
33% of 15 decks +31% synergy
Cruel Celebrant
29% of 28 decks +20% synergy
Blood Artist
29% of 28 decks +17% synergy
Pinnacle Monk
27% of 11 decks +23% synergy
Anger
27% of 15 decks +21% synergy
Abdel Adrian, Gorion's Ward
25% of 28 decks +24% synergy
Yawgmoth, Thran Physician
25% of 28 decks +22% synergy
Grim Haruspex
25% of 28 decks +21% synergy
Loran of the Third Path
25% of 28 decks +19% synergy
Gray Merchant of Asphodel
25% of 28 decks +16% synergy
Elas il-Kor, Sadistic Pilgrim
25% of 28 decks +15% synergy
Restoration Angel
21% of 28 decks +19% synergy
Recruiter of the Guard
21% of 28 decks +19% synergy
Skyclave Apparition
21% of 28 decks +18% synergy
Stitcher's Supplier
21% of 28 decks +18% synergy
Ravenous Chupacabra
21% of 28 decks +18% synergy
Selfless Spirit
21% of 28 decks +17% synergy
Charming Scoundrel
20% of 15 decks +19% synergy
Murderous Redcap
20% of 15 decks +18% synergy
Guide of Souls
20% of 20 decks +18% synergy
Warren Soultrader
20% of 20 decks +15% synergy
Witch Enchanter
20% of 20 decks +13% synergy
Professional Face-Breaker
20% of 15 decks +12% synergy
Dockside Extortionist
20% of 15 decks +12% synergy
Body Launderer
18% of 28 decks +17% synergy
Flickerwisp
18% of 28 decks +16% synergy
Vile Entomber
18% of 28 decks +16% synergy
Priest of Fell Rites
18% of 28 decks +16% synergy
Knight of the White Orchid
18% of 28 decks +12% synergy
Welcoming Vampire
18% of 28 decks +12% synergy
Corpse Knight
18% of 28 decks +12% synergy
Syr Konrad, the Grim
18% of 28 decks +9% synergy
Grand Abolisher
18% of 28 decks +9% synergy
Esper Sentinel
18% of 28 decks -2% synergy
Lotho, Corrupt Shirriff
15% of 27 decks +2% synergy
Faceless Butcher
14% of 28 decks +14% synergy
Cartel Aristocrat
14% of 28 decks +14% synergy
Instants
Grisly Salvage
43% of 7 decks +37% synergy
Worldly Tutor
43% of 7 decks +29% synergy
Path to Exile
39% of 28 decks -7% synergy
Entomb
32% of 28 decks +25% synergy
Anguished Unmaking
32% of 28 decks +8% synergy
Ephemerate
29% of 28 decks +23% synergy
Thrill of Possibility
27% of 15 decks +17% synergy
Teferi's Protection
21% of 28 decks +2% synergy
Bedevil
20% of 15 decks +6% synergy
Boros Charm
20% of 15 decks -4% synergy
Eerie Interlude
18% of 28 decks +14% synergy
Village Rites
18% of 28 decks +8% synergy
Cloudshift
14% of 28 decks +11% synergy
Utter End
14% of 28 decks +8% synergy
Malakir Rebirth
14% of 28 decks +6% synergy
Deadly Rollick
14% of 28 decks +3% synergy
Dark Ritual
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11% of 28 decks +10% synergy
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11% of 28 decks +9% synergy
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11% of 28 decks +1% synergy
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Enchantments
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14% of 28 decks +12% synergy
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11% of 28 decks +9% synergy
Cathars' Crusade
11% of 28 decks +5% synergy
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27% of 15 decks +25% synergy
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Urborg, Tomb of Yawgmoth
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Takenuma, Abandoned Mire
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Vault of the Archangel
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Ghost Quarter
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Access Tunnel
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Castle Locthwain
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Temple of the False God
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Arcane Signet
71% of 28 decks -1% synergy
Orzhov Signet
36% of 28 decks +9% synergy
Rakdos Signet
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Talisman of Hierarchy
29% of 28 decks +3% synergy
Boros Signet
27% of 15 decks +4% synergy
Talisman of Conviction
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Thought Vessel
14% of 28 decks -3% synergy
Fellwar Stone
14% of 28 decks -7% synergy
Lands
Command Tower
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Sacred Foundry
80% of 15 decks +45% synergy
Blood Crypt
73% of 15 decks +35% synergy
Luxury Suite
60% of 15 decks +34% synergy
Sandsteppe Citadel
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Llanowar Wastes
57% of 7 decks +31% synergy
Godless Shrine
54% of 28 decks +13% synergy
Savai Triome
53% of 15 decks +27% synergy
Dragonskull Summit
47% of 15 decks +14% synergy
Selesnya Sanctuary
43% of 7 decks +29% synergy
Overgrown Farmland
43% of 7 decks +27% synergy
Temple of Malady
43% of 7 decks +26% synergy
Golgari Rot Farm
43% of 7 decks +25% synergy
Caves of Koilos
43% of 28 decks +14% synergy
Woodland Cemetery
43% of 7 decks +13% synergy
Exotic Orchard
43% of 28 decks +7% synergy
Spectator Seating
40% of 15 decks +15% synergy
Battlefield Forge
40% of 15 decks +14% synergy
Marsh Flats
39% of 28 decks +28% synergy
Vault of Champions
39% of 28 decks +14% synergy
Arid Mesa
36% of 28 decks +25% synergy
Nomad Outpost
33% of 15 decks +5% synergy
Clifftop Retreat
33% of 15 decks +3% synergy
Isolated Chapel
32% of 28 decks +3% synergy
Shadowy Backstreet
29% of 24 decks +19% synergy
Elegant Parlor
29% of 14 decks +21% synergy
Raucous Theater
29% of 14 decks +19% synergy
Bloodstained Mire
29% of 28 decks +18% synergy
Evolving Wilds
29% of 28 decks +8% synergy
Path of Ancestry
29% of 28 decks +7% synergy
Sulfurous Springs
27% of 15 decks +5% synergy
Orzhov Basilica
25% of 28 decks +9% synergy
Concealed Courtyard
21% of 28 decks +16% synergy
Sunbaked Canyon
20% of 15 decks +15% synergy
Needleverge Pathway
20% of 15 decks +11% synergy
Plateau
20% of 15 decks +8% synergy
Rakdos Carnarium
20% of 15 decks +6% synergy
Terramorphic Expanse
18% of 28 decks +2% synergy
Scoured Barrens
14% of 28 decks +5% synergy
Brightclimb Pathway
14% of 28 decks +5% synergy
Fetid Heath
14% of 28 decks +3% synergy
Tainted Field
14% of 28 decks +1% synergy
Temple of Silence
14% of 28 decks -4% synergy
Desolate Mire
13% of 23 decks +8% synergy
Mana Confluence
11% of 28 decks +4% synergy
Wooded Foothills
11% of 28 decks +0% synergy
Windswept Heath
11% of 28 decks +0% synergy
Flooded Strand
11% of 28 decks -0% synergy
Verdant Catacombs
11% of 28 decks -0% synergy
Shineshadow Snarl
11% of 28 decks -2% synergy