Cast Abdel Adrian by paying {4}{W}.
When Abdel Adrian enters, it triggers, exiling Rescue Skiff until Abdel Adrian leaves the battlefield and creating a 1/1 Soldier creature token.
Activate Ashnod's Altar by sacrificing Abdel Adrian
Abdel Adrian leaves the battlefield, causing Rescue Skiff to return to the battlefield from exile.
When Rescue Skiff enters, it triggers, returning Abdel Adrian from your graveyard to the battlefield.
When Abdel Adrian enters, it triggers, exiling Rescue Skiff until Abdel Adrian leaves the battlefield and creating a 1/1 Soldier creature token.
Repeat from step 3.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite colorless mana

Infinite creature tokens

Infinite blinking of nonland permanents

Abdel Adrian, Gorion's Ward

Rescue Skiff

Ashnod's Altar

Cast Rescue Skiff by paying its mana cost.
When Rescue Skiff enters, it triggers, returning Felidar Guardian from your graveyard to the battlefield.
When Felidar Guardian enters, it and Preston trigger.
Resolve the Felidar Guardian trigger, blinking another permanent you control.
Resolve the Preston trigger, creating a token copy of Felidar Guardian that is a 0/1 Illusion.
When the Felidar Guardian token enters the battlefield, it triggers, blinking the nontoken Felidar Guardian.
Repeat from step 3.

Exile all nonland permanents opponents control

Infinite blinking of permanents

Infinite landfall triggers

Infinite mana lands you control can produce

Infinite mana lands you control that enter the battlefield untapped can produce

Preston, the Vanisher

Felidar Guardian

Cast Felidar Guardian by paying its mana cost.
When Felidar Guardian enters the battlefield, it triggers, targeting Rescue Skiff
Holding priority, activate Ashnod's Altar by sacrificing Felidar Guardian.
Resolve the Felidar Guardian ability, blinking Rescue Skiff
When Rescue Skiff enters, it triggers, returning Felidar Guardian from your graveyard to the battlefield.
Repeat from step 2.

Cast Leonin Relic-Warder by paying {W}{W}.
When Leonin Relic-Warder enters, its first ability triggers, exiling Rescue Skiff.
Activate Altar of Dementia by sacrificing Leonin Relic-Warder.
When Leonin Relic-Warder dies, its second ability triggers, returning Rescue Skiff from exile to the battlefield.
When Rescue Skiff enters, it triggers, returning Leonin Relic-Warder from your graveyard to the battlefield.
When Leonin Relic-Warder enters, its first ability triggers, exiling Rescue Skiff.
Resolve the Altar of Dementia ability from step 3.
Repeat from step 3.

Infinite mill

Infinite self-mill

Leonin Relic-Warder

Altar of Dementia

Cast Rescue Skiff by paying {5}{W}.
When Rescue Skiff enter the battlefield, it triggers, targeting Sharuum.
Holding priority, activate Umbral Collar Zealot by sacrificing Rescue Skiff.
Resolve the Rescue Skiff trigger, returning Sharuum from your graveyard to the battlefield.
When Sharuum enters the battlefield, it triggers, targeting Rescue Skiff.
Holding priority, activate Umbral Collar Zealot by sacrificing Sharuum.
Resolve the Sharuum trigger, returning Rescue Skiff from your graveyard to the battlefield.
Repeat from step 2.

Infinite surveil

Sharuum the Hegemon

Umbral Collar Zealot

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