Activate Captain Sisay by tapping it, searching your library for Ulamog and putting it into your hand.
Activate Mind Over Matter by discarding Ulamog.
Ulamog triggers, shuffling your graveyard into your library.
Resolve the Mind Over Matter ability, untapping Captain Sisay.
Repeat.

Infinite self-discard triggers

Captain Sisay

Mind Over Matter

Ulamog, the Infinite Gyre

Activate Captain Sisay by tapping it, searching your library for Kozilek and putting it into your hand.
Activate Mind Over Matter by discarding Kozilek.
Kozilek triggers, shuffling your graveyard into your library.
Resolve the Mind Over Matter ability, untapping Captain Sisay.
Repeat.

Kozilek, Butcher of Truth

Activate Captain Sisay by tapping it, searching your library for Progenitus and putting it into your hand.
Activate Mind Over Matter by discarding Progenitus.
Progenitus triggers, shuffling your graveyard into your library.
Resolve the Mind Over Matter ability, untapping Captain Sisay.
Repeat.

Progenitus

Activate Captain Sisay by tapping it, searching your library for Emrakul and putting it into your hand.
Activate Mind Over Matter by discarding Emrakul.
Emrakul triggers, shuffling your graveyard into your library.
Resolve the Mind Over Matter ability, untapping Captain Sisay.
Repeat.

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