Activate Ashnod's Altar by sacrificing Angel of Invention, adding {C}{C}.
When Angel of Invention dies, Nim Deathmantle triggers, causing you to pay {4} to return Angel of Invention from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Angel of Invention enters, it triggers, creating two creature tokens.
Activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
Repeat.

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite colorless mana

Infinite creature tokens

Nim Deathmantle

Ashnod's Altar

Angel of Invention

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

Infinite scry 1

Effects that Alter a Creature's Power/Toughness (Anthem Effects)

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

Viscera Seer

Activate Eldrazi Displacer by paying {2}{C}, blinking Angel of Invention.
When Angel of Invention enters, it triggers, creating two creature tokens.
Activate Ashnod's Altar by sacrificing two creature tokens, adding {C}{C}{C}{C}.
Repeat.

Infinite blinking

Infinite blinking of most creatures

Eldrazi Displacer

Activate Angel of Invention by paying {1}{U}, blinking it.
When Angel of Invention enters the battlefield, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Deadeye Navigator trigger, repairing it and Angel of Invention
Resolve the Angel of Invention trigger, creating two artifact tokens.
Activate Urza's first ability twice by tapping two artifacts, adding {U}{U}.
Repeat.

Combos with "Angel of Invention"