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 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.

Felidar Guardian

Cast Fiend Hunter by paying its mana cost.
When Fiend Hunter enters, its first ability triggers, exiling Rescue Skiff.
Activate Ashnod's Altar by sacrificing Fiend Hunter.
When Fiend Hunter dies, its second ability triggers, returning Rescue Skiff from exile to the battlefield.
When Rescue Skiff enters, it triggers, returning Fiend Hunter from your graveyard to the battlefield.
When Fiend Hunter enters, its first ability triggers, exiling Rescue Skiff.
Repeat from step 3.

Fiend Hunter

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

Sharuum the Hegemon

Krark-Clan Ironworks

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.

Combos with "Rescue Skiff"