Activate Ashnod's Altar by sacrificing Accomplished Automaton, adding {C}{C}.
When Accomplished Automaton dies, Nim Deathmantle triggers, causing you to pay {4} to return Accomplished Automaton from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Accomplished Automaton enters the battlefield, its fabricate ability triggers, creating a 1/1 Servo artifact creature token.
Activate Ashnod's Altar by sacrificing the Servo, adding {C}{C}.
Repeat.

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Accomplished Automaton

Activate Krark-Clan Ironworks by sacrificing Accomplished Automaton, adding {C}{C}.
When Accomplished Automaton dies, Nim Deathmantle triggers, causing you to pay {4} to return Accomplished Automaton from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Accomplished Automaton enters the battlefield, its fabricate ability triggers, creating a 1/1 Servo artifact creature token.
Activate Krark-Clan Ironworks by sacrificing the Servo, adding {C}{C}.
Repeat.

Krark-Clan Ironworks

Activate Viscera Seer by sacrificing Accomplished Automaton.
When Accomplished Automaton dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When Accomplished Automaton enters, its fabricate ability triggers, putting a +1/+1 counter on it.
Resolve the Viscera Seer ability.
Repeat.

Infinite scry 1

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Viscera Seer

Activate Accomplished Alchemist by tapping it, adding at least six {G}.
Cast Woodcaller Automaton for its prototype cost by paying {2}{G}{G}.
When Woodcaller Automaton enters, it triggers, untapping Accomplished Alchemist
Activate Temur Sabertooth by paying {1}{G}, returning Woodcaller Automaton from the battlefield to your hand.
Repeat.

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