Sporoloth Ancient + Tainted Observer + Ashnod's Altar + Primal Vigor

Sporoloth Ancient
Tainted Observer
Ashnod's Altar
Primal Vigor

Requires
Sporoloth Ancient must be on the battlefield. Tainted Observer must be on the battlefield. Ashnod's Altar must be on the battlefield. Primal Vigor 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 two 1/1 Saproling creature tokens.
  2. The Saprolings enter the battlefield, triggering Tainted Observer twice.
  3. Holding priority, activate Ashnod's Altar twice by sacrificing the Saprolings, adding .
  4. Resolve both Tainted Observer triggers, causing you to pay 4 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.

Xavier Sal, Infested Captain
0.05% of 3690 decks 2 decks
Atraxa, Praetors' Voice
0.00% of 34221 decks 1 decks
New Cards
Innkeeper's Talent
100% of 1 decks +94% synergy
Brightcap Badger
100% of 1 decks +98% synergy
Creatures
Ertai, the Corrupted
100% of 1 decks +100% synergy
Mycologist
100% of 1 decks +100% synergy
Pallid Mycoderm
100% of 1 decks +100% synergy
Elvish Farmer
100% of 3 decks +100% synergy
Spore Flower
100% of 3 decks +100% synergy
Ghave, Guru of Spores
100% of 1 decks +100% synergy
Vitaspore Thallid
100% of 3 decks +100% synergy
Psychotrope Thallid
100% of 3 decks +100% synergy
Sporecrown Thallid
100% of 3 decks +100% synergy
Deathspore Thallid
100% of 3 decks +100% synergy
Utopia Mycon
100% of 3 decks +100% synergy
Slimefoot, the Stowaway
100% of 3 decks +100% synergy
Nemata, Primeval Warden
100% of 3 decks +99% synergy
Ezuri, Stalker of Spheres
100% of 3 decks +99% synergy
Mycoloth
100% of 3 decks +99% synergy
Agent Frank Horrigan
100% of 1 decks +99% synergy
Tekuthal, Inquiry Dominus
100% of 3 decks +99% synergy
Dreamtide Whale
100% of 1 decks +97% synergy
Cankerbloom
100% of 3 decks +96% synergy
Mondrak, Glory Dominus
100% of 1 decks +96% synergy
Thallid Devourer
67% of 3 decks +67% synergy
Thelon of Havenwood
67% of 3 decks +67% synergy
Thallid Soothsayer
67% of 3 decks +67% synergy
Savage Thallid
67% of 3 decks +67% synergy
Thallid
67% of 3 decks +66% synergy
Thallid Shell-Dweller
67% of 3 decks +66% synergy
Sporesower Thallid
67% of 3 decks +66% synergy
Sporemound
67% of 3 decks +66% synergy
Mazirek, Kraul Death Priest
67% of 3 decks +66% synergy
Winding Constrictor
67% of 3 decks +66% synergy
Tendershoot Dryad
67% of 3 decks +66% synergy
Flux Channeler
67% of 3 decks +65% synergy
Thrummingbird
67% of 3 decks +65% synergy
Evolution Sage
67% of 3 decks +63% synergy
Mirkwood Bats
67% of 3 decks +60% synergy
Nemata, Grove Guardian
33% of 3 decks +33% synergy
Plaguemaw Beast
33% of 3 decks +33% synergy
Thallid Germinator
33% of 3 decks +33% synergy
Xavier Sal, Infested Captain
33% of 3 decks +33% synergy
Hell's Caretaker
33% of 3 decks +33% synergy
Verdeloth the Ancient
33% of 3 decks +33% synergy
Thelonite Hermit
33% of 3 decks +33% synergy
Undercellar Myconid
33% of 3 decks +33% synergy
The Mycotyrant
33% of 3 decks +33% synergy
Verdant Force
33% of 3 decks +33% synergy
Pir, Imaginative Rascal
33% of 3 decks +33% synergy
Master Biomancer
33% of 3 decks +32% synergy
Scurry Oak
33% of 3 decks +32% synergy
Sakashima the Impostor
33% of 3 decks +32% synergy
Deepglow Skate
33% of 3 decks +32% synergy
Instants
Ready // Willing
100% of 1 decks +100% synergy
Deny the Witch
100% of 1 decks +100% synergy
Aura Mutation
100% of 1 decks +99% synergy
Mutational Advantage
100% of 1 decks +98% synergy
Atomize
100% of 1 decks +98% synergy
Experimental Augury
67% of 3 decks +65% synergy
Ripples of Potential
67% of 3 decks +65% synergy
Assassin's Trophy
67% of 3 decks +60% synergy
Sprout Swarm
33% of 3 decks +33% synergy
Fungal Rebirth
33% of 3 decks +33% synergy
Fuel for the Cause
33% of 3 decks +33% synergy
For the Ancestors
33% of 3 decks +33% synergy
Steady Progress
33% of 3 decks +33% synergy
Serum Snare
33% of 3 decks +33% synergy
Golgari Charm
33% of 3 decks +32% synergy
Abrupt Decay
33% of 3 decks +31% synergy
Beast Within
33% of 3 decks +15% synergy
Counterspell
33% of 3 decks +12% synergy
Sorceries
Rite of Oblivion
100% of 1 decks +99% synergy
Eerie Ultimatum
100% of 1 decks +99% synergy
Tezzeret's Gambit
67% of 3 decks +65% synergy
Unnatural Restoration
67% of 3 decks +65% synergy
Farseek
67% of 3 decks +51% synergy
Gaea's Bounty
33% of 3 decks +33% synergy
Saproling Migration
33% of 3 decks +33% synergy
Saproling Symbiosis
33% of 3 decks +33% synergy
Eaten Alive
33% of 3 decks +33% synergy
Contentious Plan
33% of 3 decks +32% synergy
Thirsting Roots
33% of 3 decks +32% synergy
Triumph of the Hordes
33% of 3 decks +32% synergy
Culling Ritual
33% of 3 decks +31% synergy
Damnation
33% of 3 decks +29% synergy
Toxic Deluge
33% of 3 decks +25% synergy
Nature's Lore
33% of 3 decks +18% synergy
Kodama's Reach
33% of 3 decks +18% synergy
Cultivate
33% of 3 decks +11% synergy
Utility Artifacts
Contagion Engine
67% of 3 decks +66% synergy
Eldrazi Monument
67% of 3 decks +65% synergy
Druidic Satchel
33% of 3 decks +33% synergy
Contagion Clasp
33% of 3 decks +32% synergy
The Skullspore Nexus
33% of 3 decks +31% synergy
The Ozolith
33% of 3 decks +30% synergy
Phyrexian Altar
33% of 3 decks +29% synergy
Skullclamp
33% of 3 decks +21% synergy
Enchantments
Inexorable Tide
100% of 3 decks +99% synergy
Insidious Roots
100% of 2 decks +98% synergy
Mirari's Wake
100% of 1 decks +97% synergy
Necrogenesis
67% of 3 decks +66% synergy
Paradox Haze
67% of 3 decks +66% synergy
Moldervine Reclamation
67% of 3 decks +65% synergy
Doubling Season
67% of 3 decks +63% synergy
Life and Limb
33% of 3 decks +33% synergy
Perilous Forays
33% of 3 decks +33% synergy
Fungal Plots
33% of 3 decks +33% synergy
Attrition
33% of 3 decks +33% synergy
Evolutionary Leap
33% of 3 decks +33% synergy
Intruder Alarm
33% of 3 decks +32% synergy
Imprisoned in the Moon
33% of 3 decks +31% synergy
Growing Rites of Itlimoc
33% of 3 decks +31% synergy
Reflections of Littjara
33% of 3 decks +31% synergy
Bastion of Remembrance
33% of 3 decks +30% synergy
Parallel Lives
33% of 3 decks +30% synergy
Planeswalkers
Vraska, Betrayal's Sting
67% of 3 decks +65% synergy
Vraska, Golgari Queen
33% of 3 decks +33% synergy
Nissa, Ascended Animist
33% of 3 decks +32% synergy
Tyvar, Jubilant Brawler
33% of 3 decks +32% synergy
Utility Lands
Phyrexian Tower
33% of 3 decks +29% synergy
Yavimaya, Cradle of Growth
33% of 3 decks +24% synergy
Bojuka Bog
33% of 3 decks +18% synergy
Reliquary Tower
33% of 3 decks +4% synergy
Mana Artifacts
Sol Ring
67% of 3 decks -18% synergy
Astral Cornucopia
33% of 3 decks +32% synergy
Staff of Compleation
33% of 3 decks +32% synergy
Everflowing Chalice
33% of 3 decks +29% synergy
Lands
Wooded Bastion
100% of 1 decks +99% synergy
Shattered Sanctum
100% of 1 decks +97% synergy
Deserted Beach
100% of 1 decks +96% synergy
Overgrown Farmland
100% of 1 decks +96% synergy
Talon Gates of Madara
100% of 1 decks +95% synergy
Urza's Cave
100% of 1 decks +95% synergy
Bountiful Promenade
100% of 1 decks +95% synergy
Undergrowth Stadium
100% of 3 decks +94% synergy
Woodland Cemetery
100% of 3 decks +94% synergy
Rejuvenating Springs
100% of 3 decks +94% synergy
Canopy Vista
100% of 1 decks +92% synergy
Temple Garden
100% of 1 decks +91% synergy
Command Tower
100% of 3 decks +26% synergy
Flooded Grove
67% of 3 decks +64% synergy
Opulent Palace
67% of 3 decks +64% synergy
Hinterland Harbor
67% of 3 decks +61% synergy
Morphic Pool
67% of 3 decks +60% synergy
Breeding Pool
67% of 3 decks +57% synergy
Overgrown Tomb
67% of 3 decks +57% synergy
Exotic Orchard
67% of 3 decks +31% synergy
Twilight Mire
33% of 3 decks +31% synergy
Vineglimmer Snarl
33% of 3 decks +31% synergy
Necroblossom Snarl
33% of 3 decks +31% synergy
Deathcap Glade
33% of 3 decks +30% synergy
Zagoth Triome
33% of 3 decks +30% synergy
Dreamroot Cascade
33% of 3 decks +29% synergy
Underground River
33% of 3 decks +29% synergy
Shipwreck Marsh
33% of 3 decks +29% synergy
Llanowar Wastes
33% of 3 decks +28% synergy
Yavimaya Coast
33% of 3 decks +28% synergy
Drowned Catacomb
33% of 3 decks +27% synergy
Sunken Hollow
33% of 3 decks +25% synergy
Fabled Passage
33% of 3 decks +24% synergy
Watery Grave
33% of 3 decks +23% synergy
Path of Ancestry
33% of 3 decks +13% synergy
Evolving Wilds
33% of 3 decks +12% synergy