Valentin, Dean of the Vein + Spike Feeder + Herd Baloth + Phyrexian Altar
Valentin, Dean of the Vein
Spike Feeder
Herd Baloth
Phyrexian Altar
Requires
Valentin, Dean of the Vein // Lisette, Dean of the Root must be on the battlefield.
Spike Feeder must be on the battlefield.
Herd Baloth must be on the battlefield.
Phyrexian Altar must be on the battlefield.
Dean of the Root.
Spike Feeder has at least two +1/+1 counters on it.
Mana needed: 
Steps
- Activate Spike Feeder's second ability by removing a +1/+1 counter from it, causing you to gain two life.
- Lisette triggers, causing you to pay to put a +1/+1 counter on each creature you control.
- Herd Baloth triggers, causing you to create a 4/4 Beast creature token.
- Activate Phyrexian Altar by sacrificing the Beast token, adding .
- Repeat.
Results
Infinite +1/+1 counters. Infinite death triggers. Infinite ETB. Infinite lifegain. Infinite lifegain triggers. Infinite LTB. Infinite sacrifice triggers.
Valentin, Dean of the Vein
0.48% of 419 decks
2 decks
Savra, Queen of the Golgari
0.07% of 2969 decks
2 decks
Creatures
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100% of 1 decks
+99% synergy
The Gitrog, Ravenous Ride
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+97% synergy
Izoni, Center of the Web
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+97% synergy
Vraska, the Silencer
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+95% synergy
Compy Swarm
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Accursed Marauder
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+87% synergy
Wight of the Reliquary
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Warren Soultrader
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+85% synergy
Devoted Druid
75% of 4 decks
+70% synergy
Ivy Lane Denizen
75% of 4 decks
+69% synergy
Scurry Oak
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+69% synergy
Essence Warden
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+68% synergy
Mazirek, Kraul Death Priest
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+67% synergy
Pitiless Plunderer
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+61% synergy
Sakura-Tribe Elder
75% of 4 decks
+44% synergy
Llanowar Elves
75% of 4 decks
+41% synergy
Crystalline Crawler
50% of 4 decks
+50% synergy
Putrid Goblin
50% of 4 decks
+49% synergy
Accomplished Alchemist
50% of 4 decks
+49% synergy
Lathril, Blade of the Elves
50% of 4 decks
+48% synergy
Sedgemoor Witch
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+47% synergy
Creeping Bloodsucker
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+47% synergy
Blossoming Bogbeast
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+47% synergy
Ayara, First of Locthwain
50% of 4 decks
+45% synergy
Dina, Soul Steeper
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+44% synergy
Mosswood Dreadknight
50% of 2 decks
+44% synergy
Beledros Witherbloom
50% of 4 decks
+42% synergy
Carrion Feeder
50% of 4 decks
+42% synergy
Gala Greeters
50% of 4 decks
+42% synergy
Chatterfang, Squirrel General
50% of 4 decks
+40% synergy
Viscera Seer
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Blood Artist
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Zulaport Cutthroat
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Eternal Witness
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+21% synergy
Kami of Whispered Hopes
33% of 3 decks
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Workhorse
25% of 4 decks
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Pentavus
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Cryptic Trilobite
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Young Necromancer
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Rendclaw Trow
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Elder Gargaroth
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Puppeteer Clique
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Quillspike
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+24% synergy
Woodfall Primus
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+24% synergy
Lesser Masticore
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+24% synergy
Bloodthirsty Aerialist
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Spectrum Sentinel
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Social Climber
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Tergrid, God of Fright
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Storrev, Devkarin Lich
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Instants
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75% of 4 decks
+34% synergy
Assassin's Trophy
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+31% synergy
Mortality Spear
50% of 4 decks
+42% synergy
Tamiyo's Safekeeping
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Village Rites
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+32% synergy
Putrefy
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+15% synergy
Armor of Shadows
25% of 4 decks
+24% synergy
Wrap in Vigor
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+23% synergy
Tend the Pests
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Deadly Rollick
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Worldly Tutor
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Abrupt Decay
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+9% synergy
Deadly Dispute
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+7% synergy
Heroic Intervention
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Sorceries
Three Visits
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Diabolic Intent
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Rise of the Witch-king
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Culling Ritual
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Nature's Lore
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+23% synergy
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Eldritch Evolution
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Triumph of the Hordes
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Pest Infestation
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Casualties of War
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Reanimate
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Victimize
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Toxic Deluge
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+5% synergy
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Rampant Growth
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Utility Artifacts
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Skullclamp
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+43% synergy
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50% of 4 decks
+47% synergy
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Altar of Dementia
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+41% synergy
Lightning Greaves
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Blade of the Bloodchief
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Blasting Station
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Altar of the Brood
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Krark-Clan Ironworks
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Shadowspear
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Enchantments
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Moldervine Reclamation
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Necrosynthesis
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+25% synergy
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Phyrexian Reclamation
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Exquisite Blood
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Branching Evolution
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Cryptolith Rite
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Sanguine Bond
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Planeswalkers
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Utility Lands
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Mana Artifacts
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Lands
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+22% synergy
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Temple of Malady
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+19% synergy
Woodland Chasm
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Blooming Marsh
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Nurturing Peatland
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+11% synergy
Haunted Mire
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+6% synergy
Myriad Landscape
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+5% synergy
Jungle Hollow
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+1% synergy
Exotic Orchard
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-0% synergy
Evolving Wilds
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-2% synergy
Tainted Wood
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-16% synergy