Halo Fountain + Aphetto Alchemist + Phyrexian Altar

Halo Fountain
Aphetto Alchemist
Phyrexian Altar

Requires
Halo Fountain must be on the battlefield. Aphetto Alchemist must be on the battlefield. Phyrexian Altar must be on the battlefield. Aphetto Alchemist does not have summoning sickness. Mana needed:
Steps
  1. Activate Aphetto Alchemist by tapping it, targeting Halo Fountain.
  2. Holding priority, activate Halo Fountain's first ability by paying , tapping it and untapping Aphetto Alchemist, creating a 1/1 Citizen creature token.
  3. Resolve the Aphetto Alchemist ability, untapping Halo Fountain.
  4. Activate Phyrexian Altar by sacrificing the Citizen token, adding .
  5. Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Merieke Ri Berit
0.48% of 1860 decks 9 decks
Ertai, the Corrupted
0.27% of 734 decks 2 decks
Saint Traft and Rem Karolus
0.13% of 1564 decks 2 decks
Shorikai, Genesis Engine
0.01% of 17255 decks 1 decks
Derevi, Empyrial Tactician
0.01% of 7605 decks 1 decks
Belisarius Cawl
0.13% of 770 decks 1 decks
Volo, Itinerant Scholar // Noble Heritage
1.89% of 53 decks 1 decks
Tocasia, Dig Site Mentor
0.09% of 1175 decks 1 decks
Ellie and Alan, Paleontologists
0.07% of 1417 decks 1 decks
High Synergy Cards
Minamo, School at Water's Edge
68% of 19 decks +64% synergy
Ioreth of the Healing House
64% of 11 decks +62% synergy
Freed from the Real
63% of 19 decks +61% synergy
Vizier of Tumbling Sands
58% of 19 decks +57% synergy
Thousand-Year Elixir
58% of 19 decks +56% synergy
Phyrexian Tower
64% of 11 decks +55% synergy
Sting, the Glinting Dagger
56% of 9 decks +54% synergy
Pemmin's Aura
53% of 19 decks +51% synergy
Illusionist's Bracers
53% of 19 decks +51% synergy
Drumbellower
53% of 19 decks +50% synergy
Top Cards
Ashnod's Altar
53% of 19 decks +45% synergy
Swiftfoot Boots
53% of 19 decks +25% synergy
Patriar's Seal
47% of 19 decks +46% synergy
Skullclamp
47% of 19 decks +35% synergy
Swords to Plowshares
47% of 19 decks -15% synergy
Fatestitcher
42% of 19 decks +41% synergy
Magewright's Stone
42% of 19 decks +41% synergy
Kelpie Guide
42% of 19 decks +41% synergy
Intruder Alarm
42% of 19 decks +40% synergy
Dramatic Reversal
42% of 19 decks +37% synergy
Creatures
Mother of Runes
42% of 19 decks +35% synergy
Esper Sentinel
37% of 19 decks +16% synergy
Agent of Treachery
32% of 19 decks +30% synergy
The Ever-Changing 'Dane
30% of 10 decks +30% synergy
Coffin Queen
27% of 11 decks +27% synergy
Zur the Enchanter
27% of 11 decks +23% synergy
Arcanis the Omnipotent
26% of 19 decks +25% synergy
Giver of Runes
26% of 19 decks +24% synergy
Loran of the Third Path
24% of 17 decks +16% synergy
Aura Thief
21% of 19 decks +21% synergy
Clever Conjurer
21% of 19 decks +21% synergy
Adarkar Valkyrie
21% of 19 decks +21% synergy
Bennie Bracks, Zoologist
21% of 19 decks +19% synergy
Thassa, Deep-Dwelling
21% of 19 decks +18% synergy
Skrelv, Defector Mite
19% of 16 decks +15% synergy
Mondrak, Glory Dominus
19% of 16 decks +10% synergy
Robaran Mercenaries
17% of 18 decks +17% synergy
Callous Oppressor
16% of 19 decks +16% synergy
Beguiler of Wills
16% of 19 decks +16% synergy
Empress Galina
16% of 19 decks +15% synergy
White Plume Adventurer
16% of 19 decks +14% synergy
Mentor of the Meek
16% of 19 decks +10% synergy
Instants
Cyclonic Rift
42% of 19 decks +14% synergy
Counterspell
37% of 19 decks -6% synergy
Anguished Unmaking
36% of 11 decks +12% synergy
Energy Arc
32% of 19 decks +31% synergy
Cerulean Wisps
32% of 19 decks +31% synergy
Mana Drain
32% of 19 decks +16% synergy
Fierce Guardianship
32% of 19 decks +13% synergy
Void Rend
27% of 11 decks +13% synergy
Cloudshift
26% of 19 decks +23% synergy
Arcane Denial
26% of 19 decks +7% synergy
Teferi's Protection
26% of 19 decks +6% synergy
An Offer You Can't Refuse
26% of 19 decks +5% synergy
Refocus
21% of 19 decks +21% synergy
To Arms!
21% of 19 decks +21% synergy
Force of Will
21% of 19 decks +10% synergy
Swan Song
21% of 19 decks +5% synergy
Dovin's Veto
21% of 19 decks +2% synergy
Clever Concealment
19% of 16 decks +14% synergy
Sejiri Shelter
16% of 19 decks +12% synergy
Ghostly Flicker
16% of 19 decks +11% synergy
Force of Negation
16% of 19 decks +7% synergy
Enlightened Tutor
16% of 19 decks -2% synergy
Brainstorm
16% of 19 decks -5% synergy
Sorceries
Cultivate
100% of 3 decks +54% synergy
Diabolic Intent
36% of 11 decks +28% synergy
Demonic Tutor
36% of 11 decks +14% synergy
Toxic Deluge
27% of 11 decks +10% synergy
Austere Command
26% of 19 decks +14% synergy
Farewell
21% of 19 decks +8% synergy
Bribery
16% of 19 decks +15% synergy
Utility Artifacts
Lightning Greaves
42% of 19 decks +17% synergy
Rings of Brighthearth
32% of 19 decks +30% synergy
Isochron Scepter
32% of 19 decks +29% synergy
Unbender Tine
21% of 19 decks +21% synergy
Thornbite Staff
21% of 19 decks +20% synergy
Throne of the God-Pharaoh
16% of 19 decks +15% synergy
Conjurer's Closet
16% of 19 decks +14% synergy
Shorikai, Genesis Engine
16% of 19 decks +13% synergy
Enchantments
Rhystic Study
42% of 19 decks +14% synergy
Retreat to Coralhelm
37% of 19 decks +34% synergy
Anointed Procession
37% of 19 decks +28% synergy
Smothering Tithe
32% of 19 decks +7% synergy
Mystic Remora
26% of 19 decks +8% synergy
Mind Over Matter
16% of 19 decks +15% synergy
Planeswalkers
Teferi, Who Slows the Sunset
32% of 19 decks +29% synergy
Jace, Ingenious Mind-Mage
16% of 19 decks +16% synergy
Utility Lands
Reliquary Tower
32% of 19 decks +2% synergy
Lotus Field
21% of 19 decks +20% synergy
Arcane Lighthouse
21% of 19 decks +20% synergy
Hall of Heliod's Generosity
21% of 19 decks +14% synergy
Detection Tower
16% of 19 decks +15% synergy
High Market
16% of 19 decks +13% synergy
Academy Ruins
16% of 19 decks +11% synergy
Urza's Saga
16% of 19 decks +9% synergy
Mana Artifacts
Arcane Signet
84% of 19 decks +12% synergy
Sol Ring
84% of 19 decks -0% synergy
Azorius Signet
47% of 19 decks +21% synergy
Dimir Signet
45% of 11 decks +16% synergy
Orzhov Signet
27% of 11 decks +0% synergy
Fellwar Stone
26% of 19 decks +5% synergy
Talisman of Progress
26% of 19 decks +3% synergy
Thought Vessel
21% of 19 decks +4% synergy
Mana Vault
16% of 19 decks +9% synergy
Mind Stone
16% of 19 decks -2% synergy
Lands
Command Tower
79% of 19 decks +5% synergy
Sea of Clouds
58% of 19 decks +32% synergy
Hallowed Fountain
58% of 19 decks +17% synergy
Vault of Champions
55% of 11 decks +29% synergy
Raffine's Tower
55% of 11 decks +27% synergy
Godless Shrine
55% of 11 decks +14% synergy
Watery Grave
55% of 11 decks +14% synergy
Morphic Pool
45% of 11 decks +19% synergy
Exotic Orchard
42% of 19 decks +7% synergy
Flooded Strand
37% of 19 decks +26% synergy
Deserted Beach
37% of 19 decks +21% synergy
Prairie Stream
37% of 19 decks +3% synergy
Shattered Sanctum
36% of 11 decks +23% synergy
Shipwreck Marsh
27% of 11 decks +8% synergy
Arcane Sanctum
27% of 11 decks -0% synergy
Mystic Gate
26% of 19 decks +20% synergy
Polluted Delta
26% of 19 decks +15% synergy
Glacial Fortress
26% of 19 decks +1% synergy
Reflecting Pool
21% of 19 decks +16% synergy
Marsh Flats
21% of 19 decks +10% synergy
Adarkar Wastes
21% of 19 decks +4% synergy
Prismatic Vista
16% of 19 decks +10% synergy
Fabled Passage
16% of 19 decks +7% synergy
Azorius Chancery
16% of 19 decks +1% synergy
Evolving Wilds
16% of 19 decks -5% synergy