Activate Arcbound Ravager by sacrificing Arcbound Overseer.
When Arcbound Overseer dies, its modular ability and persist ability trigger.
Resolve the modular trigger, putting Arcbound Overseer's +1/+1 counters on another artifact creature.
Resolve the persist trigger, returning Arcbound Overseer from your graveyard to the battlefield. It will not have a -1/-1 counter on it due to its modular ability.
Resolve the Arcbound Ravager ability.
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite +1/+1 counters on a creature

Infinite +1/+1 counters on certain creatures

Draw the game

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

Arcbound Ravager

Arcbound Overseer

Activate Arcbound Overseer by paying {1}{U}, blinking it.
Arcbound Overseer leaves and reenters the battlefield, causing it to enter with +1/+1 counters due to its modular ability, and triggering The Ooze and Deadeye Navigator's soulbond ability.
Resolve Deadeye Navigator's trigger, repairing it and Arcbound Overseer
Resolve The Ooze's trigger, creating a Mutagen token for each +1/+1 counter that was on Arcbound Overseer when it left the battlefield.
Activate Urza's first ability twice by tapping Arcbound Overseer and a Mutagen, adding {U}{U}.
Repeat.

Infinite artifact tokens

Cast all spells in your library

Exile your library

Infinite blinking

Infinite blue mana

Infinite creature tokens

Infinite +1/+1 counters on creatures you control

Infinite Mutagen tokens

Urza, Lord High Artificer

Deadeye Navigator

The Ooze

Activate Crystalline Crawler's second ability by tapping it, putting a +1/+1 counter on it.
Activate Bloodthrone Vampire by sacrificing Arcbound Overseer.
When Arcbound Overseer dies, it triggers, putting its +1/+1 counters on Crystalline Crawler.
Resolve the Bloodthrone Vampire ability.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding {3}{R}{R}.
Activate Aggravated Assault by paying {3}{R}{R}, causing you to untap all creatures you control and to get an additional combat and main phase after this one.
Declare Alesha as an attacker, triggering its ability, targeting Arcbound Overseer.
Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding {W/B}{W/B}.
Resolve the Alesha trigger, causing you to pay {W/B}{W/B} to return Arcbound Overseer from your graveyard to the battlefield tapped and attacking with six +1/+1 counters on it due to its modular ability.
Repeat.

Combos with "Arcbound Overseer"