Declare Auton Soldier and the creature with Captain's Claws as attackers.
Auton Soldier's myriad ability and Captain's Claws trigger.
Resolve the Auton Soldier trigger, creating four token copies of itself as a nonlegendary copy of Mondrak attacking each other opponent.
Resolve the Captain's Claws trigger, creating 2^(the number of Mondraks you control) 1/1 Kor Ally creature tokens tapped and attacking an opponent.

Near-infinite creature tokens that are tapped and attacking

Near-infinite ETB

Mondrak, Glory Dominus

Auton Soldier

Captain's Claws

Declare Auton Soldier and the creature with Captain's Claws as attackers.
Auton Soldier's myriad ability and Captain's Claws trigger.
Resolve the Auton Soldier trigger, creating nine token copies of itself as a nonlegendary copy of Ojer Taq attacking each other opponent.
Resolve the Captain's Claws trigger, creating 3^(the number of Ojer Taqs you control) 1/1 Kor Ally creature tokens tapped and attacking an opponent.

Ojer Taq, Deepest Foundation // Temple of Civilization

Declare Auton Soldier and the creature with Captain's Claws as attackers.
Auton Soldier's myriad ability and Captain's Claws trigger.
Resolve the Auton Soldier trigger, creating four token copies of itself as a nonlegendary copy of Adrix and Nev attacking each other opponent.
Resolve the Captain's Claws trigger, creating 2^(the number of Adrix and Nevs you control) 1/1 Kor Ally creature tokens tapped and attacking an opponent.

Combos with "Captain's Claws"