Prowling Geistcatcher + Saffi Eriksdotter + Phyrexian Altar

Prowling Geistcatcher
Saffi Eriksdotter
Phyrexian Altar

Requires
Prowling Geistcatcher must be on the battlefield. Saffi Eriksdotter must be on the battlefield. Phyrexian Altar must be on the battlefield.
Steps
  1. Activate Saffi by sacrificing it, targeting Prowling Geistcatcher.
  2. When Saffi dies, Prowling Geistcatcher's first ability triggers, exiling Saffi from your graveyard.
  3. Resolve the Saffi ability.
  4. Activate Phyrexian Altar by sacrificing Prowling Geistcatcher, adding one mana of any color.
  5. When Prowling Geistcatcher dies, its second ability and Saffi trigger.
  6. Resolve the Saffi trigger, returning Prowling Geistcatcher from your graveyard to the battlefield.
  7. Resolve the Prowling Geistcatcher trigger, returning Saffi from exile to the battlefield.
  8. Repeat.
Results
Infinite colored mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Karador, Ghost Chieftain
0.09% of 5433 decks 5 decks
High Synergy Cards
Karmic Guide
73% of 15 decks +69% synergy
Carrion Feeder
60% of 15 decks +55% synergy
Reveillark
53% of 15 decks +51% synergy
Viscera Seer
60% of 15 decks +50% synergy
High Market
47% of 15 decks +43% synergy
Zulaport Cutthroat
53% of 15 decks +43% synergy
Phyrexian Tower
47% of 15 decks +38% synergy
Urborg, Tomb of Yawgmoth
47% of 15 decks +37% synergy
Sun Titan
47% of 15 decks +36% synergy
Elas il-Kor, Sadistic Pilgrim
47% of 15 decks +35% synergy
Top Cards
Swords to Plowshares
67% of 15 decks +4% synergy
Birds of Paradise
53% of 15 decks +27% synergy
Skullclamp
47% of 15 decks +34% synergy
Sakura-Tribe Elder
47% of 15 decks +28% synergy
Eternal Witness
47% of 15 decks +25% synergy
Animate Dead
40% of 15 decks +31% synergy
Reanimate
40% of 15 decks +25% synergy
Renegade Rallier
33% of 15 decks +33% synergy
Altar of Dementia
33% of 15 decks +30% synergy
Grim Haruspex
33% of 15 decks +29% synergy
Creatures
Wood Elves
33% of 15 decks +26% synergy
Pitiless Plunderer
33% of 15 decks +26% synergy
Avacyn's Pilgrim
33% of 15 decks +18% synergy
Body Launderer
27% of 15 decks +26% synergy
Stitcher's Supplier
27% of 15 decks +24% synergy
Spore Frog
27% of 15 decks +24% synergy
Fauna Shaman
27% of 15 decks +24% synergy
Corpse Knight
27% of 15 decks +21% synergy
Cruel Celebrant
27% of 15 decks +18% synergy
Syr Konrad, the Grim
27% of 15 decks +18% synergy
Elves of Deep Shadow
27% of 15 decks +15% synergy
Dawntreader Elk
20% of 15 decks +19% synergy
Dimir House Guard
20% of 15 decks +19% synergy
Fell Stinger
20% of 15 decks +19% synergy
Fiend Hunter
20% of 15 decks +19% synergy
Luminous Broodmoth
20% of 15 decks +18% synergy
Priest of Fell Rites
20% of 15 decks +17% synergy
Woe Strider
20% of 15 decks +17% synergy
Knight of Autumn
20% of 15 decks +17% synergy
Fiend Artisan
20% of 15 decks +17% synergy
Mikaeus, the Unhallowed
20% of 15 decks +17% synergy
Yawgmoth, Thran Physician
20% of 15 decks +16% synergy
Haywire Mite
20% of 15 decks +16% synergy
Sheoldred, Whispering One
20% of 15 decks +15% synergy
Elenda, the Dusk Rose
20% of 15 decks +14% synergy
Reclamation Sage
20% of 15 decks +9% synergy
Blood Artist
20% of 15 decks +8% synergy
Fyndhorn Elves
20% of 15 decks +7% synergy
Instants
Entomb
33% of 15 decks +26% synergy
Beast Within
33% of 15 decks -6% synergy
Path to Exile
33% of 15 decks -12% synergy
Abrupt Decay
27% of 15 decks +16% synergy
Teferi's Protection
20% of 15 decks -0% synergy
Anguished Unmaking
20% of 15 decks -4% synergy
Assassin's Trophy
20% of 15 decks -10% synergy
Sorceries
Victimize
33% of 15 decks +22% synergy
Damn
27% of 15 decks +10% synergy
Farseek
27% of 15 decks -8% synergy
Cultivate
27% of 15 decks -20% synergy
Living Death
20% of 15 decks +15% synergy
Eerie Ultimatum
20% of 15 decks +7% synergy
Utility Artifacts
Ashnod's Altar
33% of 15 decks +26% synergy
Blasting Station
20% of 15 decks +19% synergy
Birthing Pod
20% of 15 decks +17% synergy
Enchantments
Necromancy
20% of 15 decks +17% synergy
Utility Lands
Bojuka Bog
33% of 15 decks +3% synergy
Takenuma, Abandoned Mire
27% of 15 decks +16% synergy
Boseiju, Who Endures
27% of 15 decks +7% synergy
Dryad Arbor
20% of 15 decks +16% synergy
Yavimaya, Cradle of Growth
20% of 15 decks +11% synergy
Mana Artifacts
Arcane Signet
60% of 15 decks -12% synergy
Sol Ring
47% of 15 decks -38% synergy
Mana Crypt
20% of 15 decks +10% synergy
Lands
Command Tower
87% of 15 decks +13% synergy
Hallowed Fountain
75% of 4 decks +34% synergy
Temple Garden
73% of 15 decks +33% synergy
Godless Shrine
73% of 15 decks +32% synergy
Overgrown Tomb
73% of 15 decks +31% synergy
Marsh Flats
60% of 15 decks +49% synergy
Indatha Triome
53% of 15 decks +22% synergy
Verdant Catacombs
53% of 15 decks +42% synergy
Vault of Champions
47% of 15 decks +21% synergy
Undergrowth Stadium
47% of 15 decks +20% synergy
Windswept Heath
47% of 15 decks +36% synergy
Isolated Chapel
40% of 15 decks +13% synergy
Woodland Cemetery
40% of 15 decks +13% synergy
Exotic Orchard
40% of 15 decks +5% synergy
Sunpetal Grove
33% of 15 decks +10% synergy
Bountiful Promenade
33% of 15 decks +9% synergy
Caves of Koilos
33% of 15 decks +5% synergy
Arid Mesa
27% of 15 decks +16% synergy
Misty Rainforest
27% of 15 decks +15% synergy
Tainted Wood
20% of 15 decks +7% synergy
Savannah
20% of 15 decks +7% synergy
Bayou
20% of 15 decks +6% synergy
Scrubland
20% of 15 decks +6% synergy
Terramorphic Expanse
20% of 15 decks +4% synergy
Evolving Wilds
20% of 15 decks -1% synergy
Llanowar Wastes
20% of 15 decks -5% synergy
Canopy Vista
20% of 15 decks -16% synergy