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

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

Requires
Pir, Imaginative Rascal must be on the battlefield. Sporoloth Ancient must be on the battlefield. Tainted Observer must be on the battlefield. Ashnod's Altar must be on the battlefield. You control a creature with at least three spore counters on it.
Steps
  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 cc.
  4. Resolve the Tainted Observer trigger, causing you to pay 2 to put two spore counters on any creature you control.
  5. Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite proliferate. Infinite sacrifice triggers.

Top Commanders (3)
Xavier Sal, Infested Captain
0.20% of 2558 decks 5 decks
Pir, Imaginative Rascal // Toothy, Imaginary Friend
0.04% of 2646 decks 1 decks
Atraxa, Praetors' Voice
0.01% of 32292 decks 3 decks
New Cards (1)
Mutational Advantage
100% of 1 decks +97% synergy
Top Cards (10)
Thelon of Havenwood
100% of 8 decks +100% synergy
Deathspore Thallid
100% of 8 decks +100% synergy
Slimefoot, the Stowaway
100% of 8 decks +100% synergy
Winding Constrictor
100% of 8 decks +99% synergy
Vitaspore Thallid
89% of 9 decks +89% synergy
Thallid
89% of 9 decks +89% synergy
Thallid Shell-Dweller
89% of 9 decks +89% synergy
Sporesower Thallid
89% of 9 decks +89% synergy
Psychotrope Thallid
89% of 9 decks +89% synergy
Utopia Mycon
89% of 9 decks +88% synergy
Creatures (50)
Mycologist
100% of 3 decks +100% synergy
Ghave, Guru of Spores
100% of 3 decks +100% synergy
Lae'zel, Vlaakith's Champion
100% of 3 decks +98% synergy
Delney, Streetwise Lookout
100% of 1 decks +97% synergy
Mycoloth
89% of 9 decks +88% synergy
Tekuthal, Inquiry Dominus
89% of 9 decks +87% synergy
Nemata, Primeval Warden
88% of 8 decks +87% synergy
Spore Flower
78% of 9 decks +78% synergy
Thallid Germinator
78% of 9 decks +78% synergy
Evolution Sage
78% of 9 decks +74% synergy
Blood Artist
75% of 8 decks +69% synergy
Pallid Mycoderm
67% of 3 decks +67% synergy
Elvish Farmer
67% of 9 decks +67% synergy
Ezuri, Stalker of Spheres
67% of 9 decks +66% synergy
Vorinclex, Monstrous Raider
67% of 9 decks +65% synergy
Cankerbloom
62% of 8 decks +58% synergy
Thorn Thallid
56% of 9 decks +56% synergy
Thallid Devourer
56% of 9 decks +55% synergy
Savage Thallid
56% of 9 decks +55% synergy
Sporecrown Thallid
56% of 9 decks +55% synergy
Xavier Sal, Infested Captain
50% of 4 decks +50% synergy
The Mycotyrant
50% of 6 decks +49% synergy
Danny Pink
50% of 6 decks +49% synergy
Ojer Taq, Deepest Foundation
50% of 2 decks +46% synergy
Zulaport Cutthroat
50% of 8 decks +44% synergy
Tendershoot Dryad
44% of 9 decks +43% synergy
Yawgmoth, Thran Physician
38% of 8 decks +36% synergy
Pitiless Plunderer
38% of 8 decks +34% synergy
Tayam, Luminous Enigma
33% of 3 decks +33% synergy
Nemata, Grove Guardian
33% of 9 decks +33% synergy
Plaguemaw Beast
33% of 9 decks +33% synergy
Undercellar Myconid
33% of 9 decks +33% synergy
Vorel of the Hull Clade
33% of 9 decks +33% synergy
Grateful Apparition
33% of 3 decks +32% synergy
Norn's Choirmaster
33% of 3 decks +32% synergy
Noble Hierarch
33% of 3 decks +31% synergy
Welcoming Vampire
33% of 3 decks +31% synergy
Faeburrow Elder
33% of 3 decks +31% synergy
Elas il-Kor, Sadistic Pilgrim
33% of 3 decks +30% synergy
Avacyn's Pilgrim
33% of 3 decks +30% synergy
Mondrak, Glory Dominus
33% of 3 decks +29% synergy
Mirkwood Bats
29% of 7 decks +21% synergy
Scheming Aspirant
25% of 8 decks +25% synergy
Vindictive Vampire
25% of 8 decks +24% synergy
Sporemound
22% of 9 decks +21% synergy
Deepglow Skate
22% of 9 decks +21% synergy
Flux Channeler
22% of 9 decks +21% synergy
Thrummingbird
22% of 9 decks +20% synergy
Erebos, Bleak-Hearted
12% of 8 decks +12% synergy
Mazirek, Kraul Death Priest
12% of 8 decks +12% synergy
Instants (31)
Ripples of Potential
100% of 3 decks +98% synergy
Beast Within
56% of 9 decks +36% synergy
Sprout Swarm
44% of 9 decks +44% synergy
Serum Snare
38% of 8 decks +37% synergy
Steady Progress
33% of 9 decks +33% synergy
Reject Imperfection
33% of 9 decks +33% synergy
Aura Mutation
33% of 3 decks +33% synergy
Teferi's Protection
33% of 3 decks +24% synergy
Generous Gift
33% of 3 decks +21% synergy
Swords to Plowshares
33% of 3 decks +5% synergy
Village Rites
25% of 8 decks +20% synergy
Assassin's Trophy
25% of 8 decks +19% synergy
Simic Charm
22% of 9 decks +21% synergy
Experimental Augury
22% of 9 decks +20% synergy
Growth Spiral
22% of 9 decks +17% synergy
Heroic Intervention
22% of 9 decks +9% synergy
Counterspell
22% of 9 decks +1% synergy
Snuff Out
12% of 8 decks +11% synergy
Golgari Charm
12% of 8 decks +11% synergy
Dismember
12% of 8 decks +11% synergy
Plumb the Forbidden
12% of 8 decks +11% synergy
Abrupt Decay
12% of 8 decks +10% synergy
Putrefy
12% of 8 decks +9% synergy
Deadly Dispute
12% of 8 decks +7% synergy
Fungal Rebirth
11% of 9 decks +11% synergy
March of Swirling Mist
11% of 9 decks +9% synergy
Resculpt
11% of 9 decks +8% synergy
Tamiyo's Safekeeping
11% of 9 decks +8% synergy
Crop Rotation
11% of 9 decks +7% synergy
Nature's Claim
11% of 9 decks +6% synergy
Cyclonic Rift
11% of 9 decks -3% synergy
Sorceries (29)
Cultivate
67% of 9 decks +44% synergy
Farseek
56% of 9 decks +40% synergy
Tezzeret's Gambit
44% of 9 decks +43% synergy
Unnatural Restoration
44% of 9 decks +42% synergy
Nature's Lore
44% of 9 decks +30% synergy
Rampant Growth
44% of 9 decks +28% synergy
Carnivorous Canopy
33% of 9 decks +33% synergy
Damning Verdict
33% of 3 decks +32% synergy
Bala Ged Recovery
33% of 9 decks +29% synergy
Three Visits
33% of 9 decks +22% synergy
Culling Ritual
25% of 8 decks +23% synergy
Damnation
25% of 8 decks +20% synergy
Saproling Symbiosis
22% of 9 decks +22% synergy
Kodama's Reach
22% of 9 decks +7% synergy
Bitter Ordeal
12% of 8 decks +12% synergy
Pact of the Serpent
12% of 8 decks +11% synergy
Thirsting Roots
12% of 8 decks +11% synergy
Drown in Ichor
12% of 8 decks +11% synergy
Toxic Deluge
12% of 8 decks +4% synergy
Introduction to Annihilation
11% of 9 decks +11% synergy
Fungal Sprouting
11% of 9 decks +11% synergy
Primal Growth
11% of 9 decks +11% synergy
Reshape
11% of 9 decks +10% synergy
Contentious Plan
11% of 9 decks +10% synergy
Neoform
11% of 9 decks +10% synergy
Ravenform
11% of 9 decks +9% synergy
Curse of the Swine
11% of 9 decks +9% synergy
Overwhelming Stampede
11% of 9 decks +8% synergy
Harmonize
11% of 9 decks +7% synergy
Utility Artifacts (31)
Skullclamp
78% of 9 decks +65% synergy
The Ozolith
56% of 9 decks +52% synergy
Swiftfoot Boots
33% of 9 decks +5% synergy
Weatherlight Compleated
22% of 9 decks +22% synergy
Contagion Engine
22% of 9 decks +21% synergy
Eldrazi Monument
22% of 9 decks +21% synergy
Contagion Clasp
22% of 9 decks +21% synergy
Thousand-Year Elixir
22% of 9 decks +20% synergy
Phyrexian Altar
22% of 9 decks +18% synergy
Sting, the Glinting Dagger
14% of 7 decks +12% synergy
Infused Arrows
11% of 9 decks +11% synergy
Serum Tank
11% of 9 decks +11% synergy
Surge Node
11% of 9 decks +11% synergy
Energy Chamber
11% of 9 decks +11% synergy
Darksteel Reactor
11% of 9 decks +11% synergy
Druidic Satchel
11% of 9 decks +11% synergy
Golem Foundry
11% of 9 decks +11% synergy
Transmogrifying Wand
11% of 9 decks +11% synergy
Magistrate's Scepter
11% of 9 decks +11% synergy
Aether Vial
11% of 9 decks +11% synergy
Lux Artillery
11% of 9 decks +11% synergy
Power Conduit
11% of 9 decks +11% synergy
Animation Module
11% of 9 decks +11% synergy
Throne of Geth
11% of 9 decks +10% synergy
Umezawa's Jitte
11% of 9 decks +10% synergy
Reckoner Bankbuster
11% of 9 decks +10% synergy
Magewright's Stone
11% of 9 decks +10% synergy
Thornbite Staff
11% of 9 decks +10% synergy
Illusionist's Bracers
11% of 9 decks +10% synergy
Moonsilver Key
11% of 9 decks +9% synergy
Lightning Greaves
11% of 9 decks -14% synergy
Enchantments (38)
Doubling Season
78% of 9 decks +74% synergy
Fungal Plots
56% of 9 decks +55% synergy
Paradox Haze
56% of 9 decks +55% synergy
Court of Ardenvale
50% of 2 decks +49% synergy
Insidious Roots
50% of 2 decks +48% synergy
Fungal Bloom
44% of 9 decks +44% synergy
Moldervine Reclamation
38% of 8 decks +35% synergy
Phyrexian Arena
38% of 8 decks +30% synergy
Sporogenesis
33% of 9 decks +33% synergy
Resourceful Defense
33% of 3 decks +33% synergy
Intruder Alarm
33% of 9 decks +32% synergy
Brokers Ascendancy
33% of 3 decks +32% synergy
Inexorable Tide
33% of 9 decks +32% synergy
Anointed Procession
33% of 3 decks +29% synergy
Black Market
25% of 8 decks +23% synergy
Night Soil
22% of 9 decks +22% synergy
Life and Limb
22% of 9 decks +22% synergy
Verdant Embrace
22% of 9 decks +22% synergy
Fecundity
22% of 9 decks +22% synergy
As Foretold
22% of 9 decks +21% synergy
Beastmaster Ascension
22% of 9 decks +19% synergy
Tribute to the World Tree
14% of 7 decks +10% synergy
Necrogenesis
12% of 8 decks +12% synergy
Golgari Germination
12% of 8 decks +12% synergy
The Meathook Massacre
12% of 8 decks +10% synergy
Bastion of Remembrance
12% of 8 decks +9% synergy
Iceberg
11% of 9 decks +11% synergy
Mana Bloom
11% of 9 decks +11% synergy
Evolutionary Leap
11% of 9 decks +10% synergy
Master Chef
11% of 9 decks +10% synergy
Primal Vigor
11% of 9 decks +10% synergy
Khalni Heart Expedition
11% of 9 decks +10% synergy
Simic Ascendancy
11% of 9 decks +10% synergy
Ominous Seas
11% of 9 decks +10% synergy
Cryptolith Rite
11% of 9 decks +9% synergy
Growing Rites of Itlimoc
11% of 9 decks +9% synergy
Parallel Lives
11% of 9 decks +8% synergy
Wild Growth
11% of 9 decks +6% synergy
Planeswalkers (3)
Kaya, Orzhov Usurper
33% of 3 decks +33% synergy
Vraska, Betrayal's Sting
25% of 8 decks +23% synergy
Tezzeret, Betrayer of Flesh
11% of 9 decks +10% synergy
Utility Lands (22)
Calciform Pools
67% of 3 decks +67% synergy
Saltcrusted Steppe
67% of 3 decks +67% synergy
Karn's Bastion
44% of 9 decks +39% synergy
Nesting Grounds
33% of 9 decks +32% synergy
Hall of Heliod's Generosity
33% of 3 decks +30% synergy
Yavimaya, Cradle of Growth
33% of 9 decks +24% synergy
Dreadship Reef
25% of 8 decks +25% synergy
Hickory Woodlot
22% of 9 decks +22% synergy
Reliquary Tower
22% of 9 decks -6% synergy
Phyrexian Tower
12% of 8 decks +8% synergy
Rushwood Grove
11% of 9 decks +11% synergy
Saprazzan Cove
11% of 9 decks +11% synergy
Saprazzan Skerry
11% of 9 decks +11% synergy
Novijen, Heart of Progress
11% of 9 decks +11% synergy
Blast Zone
11% of 9 decks +10% synergy
Tyrite Sanctum
11% of 9 decks +9% synergy
Academy Ruins
11% of 9 decks +9% synergy
Castle Garenbrig
11% of 9 decks +9% synergy
Seat of the Synod
11% of 9 decks +8% synergy
Urza's Saga
11% of 9 decks +4% synergy
Boseiju, Who Endures
11% of 9 decks +2% synergy
Temple of the False God
11% of 9 decks +1% synergy
Mana Artifacts (14)
Sol Ring
89% of 9 decks +5% synergy
Arcane Signet
56% of 9 decks -15% synergy
Astral Cornucopia
44% of 9 decks +43% synergy
Talisman of Resilience
25% of 8 decks +23% synergy
Strixhaven Stadium
22% of 9 decks +22% synergy
Replicating Ring
22% of 9 decks +21% synergy
Staff of Compleation
22% of 9 decks +20% synergy
Green Mana Battery
11% of 9 decks +11% synergy
Blue Mana Battery
11% of 9 decks +11% synergy
Jeweled Amulet
11% of 9 decks +11% synergy
Patriar's Seal
11% of 9 decks +9% synergy
Liquimetal Torque
11% of 9 decks +7% synergy
Everflowing Chalice
11% of 9 decks +6% synergy
Mana Vault
11% of 9 decks +5% synergy
Lands (50)
Command Tower
78% of 9 decks +5% synergy
Indatha Triome
67% of 3 decks +63% synergy
Raffine's Tower
67% of 3 decks +63% synergy
Spara's Headquarters
67% of 3 decks +63% synergy
Bountiful Promenade
67% of 3 decks +61% synergy
Sea of Clouds
67% of 3 decks +61% synergy
Temple Garden
67% of 3 decks +58% synergy
Breeding Pool
56% of 9 decks +46% synergy
Exotic Orchard
56% of 9 decks +21% synergy
Zagoth Triome
50% of 8 decks +46% synergy
Yavimaya Coast
44% of 9 decks +39% synergy
Llanowar Wastes
38% of 8 decks +32% synergy
Woodland Cemetery
38% of 8 decks +32% synergy
Overgrown Tomb
38% of 8 decks +28% synergy
Sandsteppe Citadel
33% of 3 decks +31% synergy
Seaside Citadel
33% of 3 decks +30% synergy
Selesnya Sanctuary
33% of 3 decks +30% synergy
Azorius Chancery
33% of 3 decks +30% synergy
Orzhov Basilica
33% of 3 decks +30% synergy
Vault of Champions
33% of 3 decks +27% synergy
Godless Shrine
33% of 3 decks +24% synergy
Fabled Passage
33% of 9 decks +24% synergy
Darkbore Pathway
25% of 8 decks +23% synergy
Opulent Palace
25% of 8 decks +22% synergy
Deathcap Glade
25% of 8 decks +22% synergy
Undergrowth Stadium
25% of 8 decks +19% synergy
Sunken Hollow
25% of 8 decks +16% synergy
Watery Grave
25% of 8 decks +14% synergy
Tendo Ice Bridge
22% of 9 decks +22% synergy
Gemstone Mine
22% of 9 decks +22% synergy
Dreamroot Cascade
22% of 9 decks +18% synergy
Simic Growth Chamber
22% of 9 decks +18% synergy
Rejuvenating Springs
22% of 9 decks +16% synergy
Golgari Rot Farm
12% of 8 decks +9% synergy
Underground River
12% of 8 decks +8% synergy
Dimir Aqueduct
12% of 8 decks +8% synergy
Drowned Catacomb
12% of 8 decks +6% synergy
Morphic Pool
12% of 8 decks +6% synergy
Mirrodin's Core
11% of 9 decks +11% synergy
Tanglepool Bridge
11% of 9 decks +10% synergy
Brokers Hideout
11% of 9 decks +9% synergy
Cabaretti Courtyard
11% of 9 decks +9% synergy
Tangled Islet
11% of 9 decks +9% synergy
Flooded Grove
11% of 9 decks +9% synergy
Krosan Verge
11% of 9 decks +8% synergy
Tropical Island
11% of 9 decks +8% synergy
Hinterland Harbor
11% of 9 decks +6% synergy
Prismatic Vista
11% of 9 decks +5% synergy
Windswept Heath
11% of 9 decks +1% synergy
Flooded Strand
11% of 9 decks +1% synergy