You have any number of other nonland permanents that enter the battlefield untapped, and that can collectively tap to produce enough mana to cast Justiciar's Portal exiled by Abdel Adrian.
Archaeomancer exiled by Abdel Adrian.
You have enough mana to cast Justiciar's Portal.
Steps
Cast Justiciar's Portal by paying its mana cost, blinking Abdel Adrian.
Abdel Adrian leaves the battlefield, returning Archaeomancer and all other cards that were exiled with it to the battlefield.
Abdel Adrian and Archaeomancer trigger.
Resolve the Archaeomancer trigger, returning Justiciar's Portal from your graveyard to your hand.
Holding priority, activate any number of nonland permanents you control by tapping them, adding at least enough mana to cast Justiciar's Portal.
Resolve the Abdel Adrian trigger, exiling Archaeomancer and the mana-producing permanents until Abdel Adrian leaves the battlefield, and creating a 1/1 Soldier creature token for each permanent exiled this way.
Repeat.
Results
Infinite LTB.
Infinite ETB.
Infinite storm count.
Infinite creature tokens.
Infinite blinking of nonland permanents you control.