Cast Time Warp by paying {3}{U}{U}, causing you to take an extra turn after this one.
Activate Roon by paying {2} and tapping it, exiling Eternal Witness until the beginning of your end step.
At the beginning of your end step, Roon triggers, returning Eternal Witness from exile to the battlefield.
Eternal Witness enters the battlefield, putting Time Warp into your hand from your graveyard.
Repeat each turn.

Infinite turns

Roon of the Hidden Realm

Eternal Witness

Time Warp

Cast Time Warp by paying {3}{U}{U}, causing you to take an extra turn after this one.
Activate Roon by paying {2} and tapping it, exiling Archaeomancer until the beginning of your end step.
At the beginning of your end step, Roon triggers, returning Archaeomancer from exile to the battlefield.
Archaeomancer enters the battlefield, putting Time Warp into your hand from your graveyard.
Repeat each turn.

Archaeomancer

Cast Temporal Manipulation by paying {3}{U}{U}, causing you to take an extra turn after this one.
Activate Roon by paying {2} and tapping it, exiling Eternal Witness until the beginning of your end step.
At the beginning of your end step, Roon triggers, returning Eternal Witness from exile to the battlefield.
Eternal Witness enters the battlefield, putting Temporal Manipulation into your hand from your graveyard.
Repeat each turn.

Temporal Manipulation

Cast Temporal Manipulation by paying {3}{U}{U}, causing you to take an extra turn after this one.
Activate Roon by paying {2} and tapping it, exiling Archaeomancer until the beginning of your end step.
At the beginning of your end step, Roon triggers, returning Archaeomancer from exile to the battlefield.
Archaeomancer enters the battlefield, putting Temporal Manipulation into your hand from your graveyard.
Repeat each turn.

Cast Walk the Aeons by paying {4}{U}{U}, causing you to take an extra turn after this one.
Activate Roon by paying {2} and tapping it, exiling Eternal Witness until the beginning of your end step.
At the beginning of your end step, Roon triggers, returning Eternal Witness from exile to the battlefield.
Eternal Witness enters the battlefield, putting Walk the Aeons into your hand from your graveyard.
Repeat each turn.

Walk the Aeons

Cast Walk the Aeons by paying {4}{U}{U}, causing you to take an extra turn after this one.
Activate Roon by paying {2} and tapping it, exiling Archaeomancer until the beginning of your end step.
At the beginning of your end step, Roon triggers, returning Archaeomancer from exile to the battlefield.
Archaeomancer enters the battlefield, putting Walk the Aeons into your hand from your graveyard.
Repeat each turn.

Activate Roon of the Hidden Realm by paying {2} and tapping it, exiling Wormfang Manta until your end step.
When Wormfang Manta leaves the battlefield, its second ability triggers, causing you to take an extra turn after this one.
At the beginning of your end step, Roon of the Hidden Realm triggers, returning Wormfang Manta to the battlefield from exile.
Wormfang Manta's first ability does not trigger due to Hushwing Gryff.
Repeat each turn.

Wormfang Manta

Hushwing Gryff

Activate Roon of the Hidden Realm by paying {2} and tapping it, exiling Wormfang Manta until your end step.
When Wormfang Manta leaves the battlefield, its second ability triggers, causing you to take an extra turn after this one.
At the beginning of your end step, Roon of the Hidden Realm triggers, returning Wormfang Manta to the battlefield from exile.
Wormfang Manta's first ability does not trigger due to Hushbringer.
Repeat each turn.

Hushbringer

Activate Roon of the Hidden Realm by paying {2} and tapping it, exiling Wormfang Manta until your end step.
When Wormfang Manta leaves the battlefield, its second ability triggers, causing you to take an extra turn after this one.
At the beginning of your end step, Roon of the Hidden Realm triggers, returning Wormfang Manta to the battlefield from exile.
Wormfang Manta's first ability does not trigger due to Tocatli Honor Guard.
Repeat each turn.

Tocatli Honor Guard

Activate Roon of the Hidden Realm by paying {2} and tapping it, exiling Wormfang Manta until your end step.
When Wormfang Manta leaves the battlefield, its second ability triggers, causing you to take an extra turn after this one.
At the beginning of your end step, Roon of the Hidden Realm triggers, returning Wormfang Manta to the battlefield from exile.
Wormfang Manta's first ability does not trigger due to Torpor Orb.
Repeat each turn

Combos with "Roon of the Hidden Realm"