Fain, the Broker + Thornbite Staff + Arcane Adaptation + Xathrid Necromancer

Fain, the Broker
Thornbite Staff
Arcane Adaptation
Xathrid Necromancer

Requires
Fain, the Broker must be on the battlefield. Thornbite Staff must be on the battlefield. Arcane Adaptation must be on the battlefield. Xathrid Necromancer must be on the battlefield. You control at least one additional creature. Thornbite Staff attached to Fain. Fain does not have summoning sickness. "Human" chosen with Arcane Adaptation.
Steps
  1. Activate Fain's first ability by tapping it and sacrificing a creature.
  2. When the creature dies, Xathrid Necromancer and Fain trigger.
  3. Resolve the Xathrid Necromancer trigger, creating a 2/2 Zombie creature token.
  4. Resolve the Fain trigger, untapping it.
  5. Resolve the Fain ability from step 1, putting two +1/+1 counters on a creature you control.
  6. Repeat.
Results
Infinite +1/+1 counters. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Volo, Itinerant Scholar // Haunted One
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Creatures
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Novijen Sages
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Jerren, Corrupted Bishop
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Mogis's Marauder
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Master of Waves
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Tempest Caller
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Misfortune Teller
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Vedalken Anatomist
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Vedalken Aethermage
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Underworld Hermit
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Keeper of Keys
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Fatestitcher
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Species Specialist
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Tribute Mage
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Plaguecrafter
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Laboratory Maniac
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Puppeteer Clique
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Havengul Lich
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Glen Elendra Archmage
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Faerie Seer
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Changeling Outcast
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Instants
Rapid Hybridization
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Cyclonic Rift
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Sorceries
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Utility Artifacts
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Cryptic Gateway
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Vanquisher's Banner
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Enchantments
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Utility Lands
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Bojuka Bog
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Mana Artifacts
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Springleaf Drum
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Fellwar Stone
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Lands
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