Cast Abdel Adrian either from your hand or from the command zone by paying and commander tax, if applicable.
When Abdel Adrian enters the battlefield, it triggers, exiling Restoration Angel and creating a 1/1 Soldier creature token.
Cast Rescue the Foal by paying , blinking Abdel Adrian and exiling Rescue the Foal.
Abdel Adrian leaves and enters the battlefield, causing Restoration Angel to return to the battlefield from exile, and triggering Abdel Adrian and Restoration Angel's enters-the-battlefield abilities.
Resolve the Abdel Adrian trigger, exiling Restoration Angel and creating a 1/1 Soldier creature token.
Resolve the Restoration Angel trigger, blinking Abdel Adrian.
Repeat from step 4.

Cast Abdel Adrian either from your hand or from the command zone by paying and commander tax, if applicable.
When Abdel Adrian enters the battlefield, it triggers, exiling Felidar Guardian and creating a 1/1 Soldier creature token.
Cast Rescue the Foal by paying , blinking Abdel Adrian and exiling Rescue the Foal.
Abdel Adrian leaves and enters the battlefield, causing Felidar Guardian to return to the battlefield from exile, and triggering Abdel Adrian and Felidar Guardian's enters-the-battlefield abilities.
Resolve the Abdel Adrian trigger, exiling Felidar Guardian and creating a 1/1 Soldier creature token.
Resolve the Felidar Guardian trigger, blinking Abdel Adrian.
Repeat from step 4.

You have enough mana to cast Rescue the Foal.

Cast Rescue the Foal by paying its mana cost, blinking Felidar Guardian.
Felidar Guardian 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 2.

Cast Abdel Adrian either from your hand or from the command zone by paying and commander tax, if applicable.
When Abdel Adrian enters the battlefield, it triggers, exiling Wispweaver Angel and creating a 1/1 Soldier creature token.
Cast Rescue the Foal by paying , blinking Abdel Adrian and exiling Rescue the Foal.
Abdel Adrian leaves and enters the battlefield, causing Wispweaver Angel to return to the battlefield from exile, and triggering Abdel Adrian and Wispweaver Angel's enters-the-battlefield abilities.
Resolve the Abdel Adrian trigger, exiling Wispweaver Angel and creating a 1/1 Soldier creature token.
Resolve the Wispweaver Angel trigger, blinking Abdel Adrian.
Repeat from step 4.

Cast Rescue the Foal by paying , blinking Fiend Hunter and exiling Rescue the Foal.
When Fiend Hunter enters the battlefield, its first ability and Preston trigger.
Resolve the Fiend Hunter trigger, exiling Abdel Adrian.
Resolve the Preston trigger, creating a copy of Fiend Hunter that is a 0/1 Illusion.
When the token Fiend Hunter enters the battlefield, its first ability triggers, exiling the nontoken Fiend Hunter until the token Fiend Hunter leaves the battlefield.
When the nontoken Fiend Hunter leaves the battlefield, its second ability triggers, returning Abdel Adrian from exile to the battlefield.
When Abdel Adrian enters the battlefield, it and Preston trigger.
Resolve the Preston trigger, creating a token copy of Abdel Adrian that is a 0/1 Illusion.
Put the token Abdel Adrian into your graveyard due to the legend rule.
The token Abdel Adrian's enters-the-battlefield ability triggers, choose not to exile a permanent.
Resolve the Abdel Adrian trigger, exiling the token Fiend Hunter and creating a 1/1 Soldier creature token.
When the token Fiend Hunter leaves the battlefield, it triggers, returning the nontoken Fiend Hunter from exile to the battlefield.
Repeat from step 2.

You have enough mana to cast Rescue the Foal.

Cast Rescue the Foal by paying its mana cost, blinking Wispweaver Angel.
Wispweaver Angel and Preston trigger.
Resolve the Wispweaver Angel trigger, blinking another creature you control.
Resolve the Preston trigger, creating a token copy of Wispweaver Angel that is a 0/1 Illusion.
When the Wispweaver Angel token enters the battlefield, it triggers, blinking the nontoken Wispweaver Angel.
Repeat from step 2.

Cast Rescue the Foal by paying , blinking Lumbering Battlement and exiling Rescue the Foal.
When Lumbering Battlement enters the battlefield, it and Preston trigger.
Resolve the Lumbering Battlement trigger, exiling Fiend Hunter until Lumbering Battlement leaves the battlefield.
When Fiend Hunter leaves the battlefield, its second ability triggers, returning any cards exiled with it to the battlefield under their owner's control.
Resolve the Preston trigger, creating a copy of Lumbering Battlement that is a 0/1 Illusion.
When the token Lumbering Battlement enters the battlefield, it triggers, exiling the nontoken Lumbering Battlement until the token Lumbering Battlement leaves the battlefield.
The nontoken Lumbering Battlement leaves the battlefield, returning Fiend Hunter from exile to the battlefield.
When Fiend Hunter enters the battlefield, its first ability and Preston trigger.
Resolve the Preston trigger, creating a token copy of Fiend Hunter that is a 0/1 Illusion.
When the token Fiend Hunter enters the battlefield, it triggers, choose not to exile a creature.
Resolve the Fiend Hunter trigger, exiling the token Lumbering Battlement.
The token Lumbering Battlement leaves the battlefield, returning the nontoken Lumbering Battlement from exile to the battlefield.
Repeat from step 2.