Activate Mindslaver by paying {4}, tapping and sacrificing it, causing you to gain control of target opponent during their next turn.
Activate Mistveil Plains by paying {W} and tapping it, putting Mindslaver on the bottom of your library from your graveyard.
During your next turn, activate Captain Sisay by tapping it, searching your library for Mindslaver and putting it into your hand.
Cast Mindslaver by paying {6}.
Repeat.

You control one opponent on their turn each turn cycle

Lock

Captain Sisay

Mindslaver

Mistveil Plains

Activate Mindslaver by paying {4}, tapping and sacrificing it.
Mindslaver is put onto the bottom of your library instead of into your graveyard due to Wheel of Sun and Moon.
Resolve the Mindslaver ability, causing you to gain control of target opponent during their next turn.
During your next turn, activate Captain Sisay by tapping it, searching your library for Mindslaver and putting it into your hand.
Cast Mindslaver by paying {6}.
Repeat.

Wheel of Sun and Moon

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.

Combos with "Captain Sisay"