Pir, Imaginative Rascal
Sporoloth Ancient
Tainted Observer
Ashnod's Altar
1

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
You control a creature with at least three spore counters on it.

   Steps

How does this combo work?
1
Activate a creature you control by removing two spore counters from it, creating a 1/1 Saproling creature token.
2
The Saproling enters the battlefield, triggering Tainted Observer.
3
Holding priority, activate Ashnod's Altar by sacrificing the Saproling, adding .
4
Resolve the Tainted Observer trigger, causing you to pay 2 to put two spore counters on any creature you control.
5
Repeat.

   Results

What do I get from this combo?
Infinite death triggers
Infinite ETB
Infinite LTB
Infinite proliferate
Infinite sacrifice triggers
Xavier Sal, Infested Captain
0.13% of 6129 decks 8 decks
Atraxa, Praetors' Voice
0.01% of 35913 decks 5 decks
Pir, Imaginative Rascal // Toothy, Imaginary Friend
0.04% of 2783 decks 1 decks
Adrix and Nev, Twincasters
0.01% of 7031 decks 1 decks
High Synergy Cards
Mycologist
100% of 5 decks +100% synergy
Deathspore Thallid
100% of 13 decks +100% synergy
Ghave, Guru of Spores
100% of 5 decks +99% synergy
Slimefoot, the Stowaway
100% of 13 decks +98% synergy
Lae'zel, Vlaakith's Champion
100% of 5 decks +97% synergy
Winding Constrictor
100% of 13 decks +96% synergy
Vitaspore Thallid
93% of 15 decks +93% synergy
Sporesower Thallid
93% of 15 decks +93% synergy
Psychotrope Thallid
93% of 15 decks +93% synergy
Utopia Mycon
93% of 15 decks +93% synergy
Top Cards
Thallid Germinator
87% of 15 decks +86% synergy
Thallid
87% of 15 decks +86% synergy
Mycoloth
87% of 15 decks +85% synergy
Tekuthal, Inquiry Dominus
87% of 15 decks +85% synergy
Nemata, Primeval Warden
85% of 13 decks +82% synergy
Pallid Mycoderm
80% of 5 decks +80% synergy
Elvish Farmer
80% of 15 decks +80% synergy
Thallid Shell-Dweller
80% of 15 decks +80% synergy
Evolution Sage
80% of 15 decks +74% synergy
Doubling Season
80% of 15 decks +70% synergy
Game Changers
Cyclonic Rift
20% of 15 decks -6% synergy
Creatures
Thelon of Havenwood
77% of 13 decks +77% synergy
Spore Flower
67% of 15 decks +67% synergy
Tendershoot Dryad
67% of 15 decks +64% synergy
Ezuri, Stalker of Spheres
67% of 15 decks +64% synergy
Blood Artist
62% of 13 decks +50% synergy
Thallid Devourer
60% of 15 decks +60% synergy
Savage Thallid
60% of 15 decks +60% synergy
Brightcap Badger
57% of 7 decks +56% synergy
Dreamtide Whale
57% of 7 decks +55% synergy
Zulaport Cutthroat
54% of 13 decks +45% synergy
Mirkwood Bats
54% of 13 decks +44% synergy
Danny Pink
43% of 14 decks +42% synergy
Nemata, Grove Guardian
40% of 15 decks +40% synergy
Sporecrown Thallid
40% of 15 decks +39% synergy
Vorinclex, Monstrous Raider
40% of 15 decks +37% synergy
Cankerbloom
40% of 15 decks +34% synergy
Yawgmoth, Thran Physician
38% of 13 decks +35% synergy
Plaguemaw Beast
33% of 15 decks +33% synergy
Thorn Thallid
27% of 15 decks +27% synergy
Undercellar Myconid
27% of 15 decks +26% synergy
Thrummingbird
27% of 15 decks +23% synergy
Adrix and Nev, Twincasters
27% of 15 decks +21% synergy
Xavier Sal, Infested Captain
25% of 12 decks +24% synergy
The Mycotyrant
25% of 12 decks +24% synergy
Scheming Aspirant
23% of 13 decks +23% synergy
Nadier's Nightblade
23% of 13 decks +19% synergy
Pitiless Plunderer
23% of 13 decks +15% synergy
Roaming Throne
21% of 14 decks +14% synergy
Verdeloth the Ancient
20% of 15 decks +20% synergy
Thelonite Hermit
20% of 15 decks +19% synergy
Sporemound
20% of 15 decks +19% synergy
Deepglow Skate
20% of 15 decks +18% synergy
Vorel of the Hull Clade
20% of 15 decks +17% synergy
Fathom Mage
20% of 15 decks +16% synergy
Instants
Assassin's Trophy
54% of 13 decks +23% synergy
Sprout Swarm
53% of 15 decks +53% synergy
Ripples of Potential
36% of 14 decks +33% synergy
Beast Within
33% of 15 decks -4% synergy
Counterspell
33% of 15 decks -9% synergy
Steady Progress
27% of 15 decks +26% synergy
Reject Imperfection
27% of 15 decks +26% synergy
Arcane Denial
27% of 15 decks +7% synergy
Heroic Intervention
27% of 15 decks -3% synergy
Serum Snare
20% of 15 decks +19% synergy
Sorceries
Farseek
67% of 15 decks +32% synergy
Cultivate
53% of 15 decks +8% synergy
Rampant Growth
47% of 15 decks +12% synergy
Saproling Symbiosis
40% of 15 decks +39% synergy
Tezzeret's Gambit
40% of 15 decks +37% synergy
Nature's Lore
40% of 15 decks +8% synergy
Three Visits
33% of 15 decks +9% synergy
Unnatural Restoration
27% of 15 decks +24% synergy
Carnivorous Canopy
20% of 15 decks +19% synergy
Fungal Sprouting
20% of 15 decks +19% synergy
Bala Ged Recovery
20% of 15 decks +12% synergy
Kodama's Reach
20% of 15 decks -10% synergy
Utility Artifacts
Skullclamp
67% of 15 decks +55% synergy
The Ozolith
33% of 15 decks +30% synergy
Lightning Greaves
33% of 15 decks +8% synergy
Swiftfoot Boots
27% of 15 decks -1% synergy
Magewright's Stone
20% of 15 decks +19% synergy
Contagion Engine
20% of 15 decks +19% synergy
Contagion Clasp
20% of 15 decks +19% synergy
Eldrazi Monument
20% of 15 decks +19% synergy
Phyrexian Altar
20% of 15 decks +16% synergy
Enchantments
Fungal Plots
67% of 15 decks +66% synergy
Paradox Haze
53% of 15 decks +52% synergy
Fungal Bloom
40% of 15 decks +40% synergy
Intruder Alarm
27% of 15 decks +25% synergy
Moldervine Reclamation
23% of 13 decks +15% synergy
Phyrexian Arena
23% of 13 decks +7% synergy
Sporogenesis
20% of 15 decks +20% synergy
Night Soil
20% of 15 decks +20% synergy
Inexorable Tide
20% of 15 decks +17% synergy
Beastmaster Ascension
20% of 15 decks +15% synergy
Growing Rites of Itlimoc
20% of 15 decks +14% synergy
Mystic Remora
20% of 15 decks +3% synergy
Planeswalkers
Vraska, Betrayal's Sting
31% of 13 decks +28% synergy
Utility Lands
Karn's Bastion
40% of 15 decks +35% synergy
Yavimaya, Cradle of Growth
40% of 15 decks +31% synergy
Nesting Grounds
33% of 15 decks +32% synergy
Reliquary Tower
27% of 15 decks -3% synergy
Boseiju, Who Endures
20% of 15 decks +1% synergy
Mana Artifacts
Sol Ring
80% of 15 decks -4% synergy
Arcane Signet
60% of 15 decks -12% synergy
Astral Cornucopia
40% of 15 decks +39% synergy
Staff of Compleation
27% of 15 decks +25% synergy
Strixhaven Stadium
20% of 15 decks +20% synergy
Everflowing Chalice
20% of 15 decks +16% synergy
Lands
Bountiful Promenade
80% of 5 decks +56% synergy
Spara's Headquarters
80% of 5 decks +51% synergy
Indatha Triome
80% of 5 decks +50% synergy
Temple Garden
80% of 5 decks +41% synergy
Command Tower
80% of 15 decks +6% synergy
Sea of Clouds
60% of 5 decks +34% synergy
Exotic Orchard
60% of 15 decks +24% synergy
Woodland Cemetery
54% of 13 decks +24% synergy
Breeding Pool
53% of 15 decks +13% synergy
Yavimaya Coast
47% of 15 decks +19% synergy
Llanowar Wastes
46% of 13 decks +20% synergy
Zagoth Triome
46% of 13 decks +17% synergy
Overgrown Tomb
46% of 13 decks +5% synergy
Fabled Passage
40% of 15 decks +31% synergy
Rejuvenating Springs
40% of 15 decks +12% synergy
Darkbore Pathway
31% of 13 decks +23% synergy
Underground River
31% of 13 decks +10% synergy
Undergrowth Stadium
31% of 13 decks +5% synergy
Watery Grave
31% of 13 decks -9% synergy
Dreamroot Cascade
27% of 15 decks +7% synergy
Hinterland Harbor
27% of 15 decks -3% synergy
Deathcap Glade
23% of 13 decks +10% synergy
Morphic Pool
23% of 13 decks -3% synergy
Verdant Catacombs
20% of 15 decks +9% synergy
Flooded Grove
20% of 15 decks +7% synergy
Path of Ancestry
20% of 15 decks -2% synergy