Saheeli, Sublime Artificer + Underworld Breach + Grinding Station + Seething Song
Saheeli, Sublime Artificer
Underworld Breach
Grinding Station
Seething Song
Requires
Saheeli, Sublime Artificer must be on the battlefield.
Underworld Breach must be on the battlefield.
Grinding Station must be on the battlefield.
Seething Song must be in the graveyard.
You control at least one additional artifact.
Mana needed: 
Steps
- Activate Grinding Station by tapping it and sacrificing another artifact, causing you to mill three cards.
- Cast Seething Song from your graveyard for its escape cost by paying and exiling three other cards from your graveyard.
- Saheeli triggers, creating a 1/1 Servo artifact creature token.
- The Servo enters the battlefield, triggering Grinding Station, untapping Grinding Station.
- Resolve Seething Song, adding .
- Repeat.
Results
Infinite self-mill. Near-infinite death triggers. Near-infinite ETB. Near-infinite LTB. Near-infinite magecraft triggers. Near-infinite red mana. Near-infinite sacrifice triggers. Near-infinite storm count.
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