Kill Arcbound Stinger.
When Arcbound Stinger dies, its persist ability triggers, returning Arcbound Stinger from your graveyard to the battlefield. It will have no counters on it due to its modular ability.
Arcbound Stinger dies as a state-based action due to having 0 toughness
Repeat from step 2.

Infinite LTB

Infinite ETB

Infinite death triggers

Draw the game

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

Arcbound Stinger

Activate Arcbound Ravager by sacrificing Arcbound Stinger.
When Arcbound Stinger dies, its modular ability triggers, putting its +1/+1 counters on Arcbound Reclaimer.
Resolve the Arcbound Ravager ability.
Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Arcbound Stinger from your graveyard onto the top of your library.
Cast Arcbound Stinger from the top of your library by paying {0} due to Fortune Teller's Talent.
Repeat.

Infinite sacrifice triggers

Infinite storm count

Infinite +1/+1 counters on a creature

Fortune Teller's Talent

Arcbound Reclaimer

Arcbound Ravager

Activate Krark-Clan Ironworks by sacrificing Arcbound Stinger, adding {C}{C}.
When Arcbound Stinger dies, Mortuary and Arcbound Stinger's modular ability trigger.
Resolve the Arcbound Stinger trigger, putting its +1/+1 counters on any other artifact creature you control.
Resolve the Mortuary trigger, putting Arcbound Stinger on top of your library from your graveyard.
Cast Arcbound Stinger from the top of your library by paying {2}.
Repeat.

Infinite +1/+1 counters on certain creatures

Errant and Giada

Mortuary

Krark-Clan Ironworks

Activate Ashnod's Altar by sacrificing Arcbound Stinger, adding {C}{C}.
When Arcbound Stinger dies, Mortuary and Arcbound Stinger's modular ability trigger.
Resolve the Arcbound Stinger trigger, putting its +1/+1 counters on any other artifact creature you control.
Resolve the Mortuary trigger, putting Arcbound Stinger on top of your library from your graveyard.
Cast Arcbound Stinger from the top of your library by paying {2}.
Repeat.

Ashnod's Altar

Combos with "Arcbound Stinger"