Eirdu, Carrier of Dawn
Grinding Station
Arcbound Fiend

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Eirdu as Isilu, Carrier of Twilight on the battlefield).

   Steps

How does this combo work?
1
Activate Grinding Station by tapping it and sacrificing Arcbound Fiend.
2
When Arcbound Fiend dies, its modular ability and persist ability trigger.
3
Resolve the modular trigger, putting Arcbound Fiend's +1/+1 counters on another artifact creature.
4
Resolve the persist trigger, returning Arcbound Fiend from your graveyard to the battlefield. It will not have a -1/-1 counter on it due to its modular ability.
5
When Arcbound Fiend enters, Grinding Station triggers, untapping Grinding Station.
6
Resolve the Grinding Station ability from step 1.
7
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite mill
Infinite self-mill
Infinite +1/+1 counters on certain creatures
Arcbound Bruiser
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Arcbound Condor
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Arcbound Crusher
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Arcbound Hybrid
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Arcbound Javelineer
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Arcbound Mouser
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Arcbound Prototype
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Arcbound Ravager
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Arcbound Reclaimer
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Arcbound Slith
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Arcbound Stinger
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Arcbound Worker
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Blood Artist
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Carrion Feeder
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Corpse Knight
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Cruel Celebrant
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Disciple of the Vault
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Elas il-Kor, Sadistic Pilgrim
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Marionette Apprentice
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Morbid Opportunist
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Scrapyard Recombiner
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Thermal Navigator
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Umbral Collar Zealot
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Viscera Seer
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Yawgmoth, Thran Physician
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Zulaport Cutthroat
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Instants
Anguished Unmaking
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Clever Concealment
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Culling the Weak
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Dark Ritual
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Dawn's Truce
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Duty Beyond Death
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Fell the Profane
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Flawless Maneuver
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Generous Gift
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Path to Exile
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Plumb the Forbidden
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Rebuff the Wicked
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Reprieve
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Sejiri Shelter
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Stroke of Midnight
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Swords to Plowshares
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Teferi's Protection
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Vampiric Tutor
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Sorceries
Demonic Tutor
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Imperial Seal
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Night's Whisper
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Reanimate
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Sign in Blood
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Utility Artifacts
Altar of Dementia
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Ashnod's Altar
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Blasting Station
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Phyrexian Altar
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Weatherlight Compleated
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Enchantments
Animate Dead
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Vampiric Rites
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Utility Lands
Ancient Den
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Ancient Tomb
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Midgar, City of Mako
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Phyrexian Tower
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Vault of Whispers
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Mana Artifacts
Arcane Signet
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Chrome Mox
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Lotus Petal
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Mana Vault
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Mox Diamond
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Mox Opal
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Sol Ring
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Lands
Bleachbone Verge
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Caves of Koilos
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City of Brass
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Command Tower
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Concealed Courtyard
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Godless Shrine
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Mana Confluence
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Marsh Flats
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Polluted Delta
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Scrubland
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Shadowy Backstreet
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Silent Clearing
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Tainted Field
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Vault of Champions
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