Cast Gulping Scraptrap by paying its mana cost.
Holding priority, activate Myojin by removing an indestructible counter from it, copying the Gulping Scraptrap spell three times.
Resolve the first Gulping Scraptrap spell.
When the Gulping Scraptrap token enters the battlefield, it triggers, putting an indestructible counter on Myojin.
Repeat from step 2.

Infinite creature ETB

Infinite creature tokens

Infinite proliferate

Infinite copies of permanent spells you control

Myojin of Cryptic Dreams

Gulping Scraptrap

Activate Myojin of Life's Web by removing a divinity counter from it, putting Gulping Scraptrap and another nonartifact creature from your hand onto the battlefield.
When Gulping Scraptrap and the additional creature enter the battlefield, Bloom Hulk triggers once and Cloudstone Curio triggers twice.
Resolve the Gulping Scraptrap trigger, putting a divinity counter on Myojin of Life's Web.
Resolve both Cloudstone Curio triggers, returning Gulping Scraptrap and the additional creature to your hand from the battlefield.
Repeat.

Infinite creature LTB

Myojin of Life's Web

Cloudstone Curio

Activate Whisper by tapping it and sacrificing Gulping Scraptrap and another creature.
When the creatures die, Gulping Scraptrap triggers once and Whisper triggers twice.
Resolve the Whisper triggers, untapping it.
Resolve the Gulping Scraptrap trigger, causing you to proliferate.
Venser triggers, creating a legendary 3/3 Hollow Sentinel artifact creature token.
Resolve the Whisper ability from step 1, returning a creature card from your graveyard to the battlefield.
Activate Whisper by tapping it and sacrificing The Hollow Sentinel and another creature you control.
When the creatures die, Whisper triggers twice, untapping Whisper.
Resolve the Whisper ability from step 7, returning Gulping Scraptrap from your graveyard to the battlefield.
When Gulping Scraptrap enters the battlefield, it triggers,  causing you to proliferate.
Venser triggers, creating a legendary 3/3 Hollow Sentinel artifact creature token.
Repeat.

Infinite death triggers

Infinite creature sacrifice triggers

Venser, Corpse Puppet

Whisper, Blood Liturgist

Thornbite Staff

Activate Whisper by tapping it and sacrificing Gulping Scraptrap and another creature.
When Gulping Scraptrap dies, it triggers, causing you to proliferate.
Venser triggers, creating a legendary 3/3 Hollow Sentinel artifact creature token.
When The Hollow Sentinel enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Resolve the Whisper ability, returning a creature card from your graveyard to the battlefield.
When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Activate Whisper by tapping it and sacrificing The Hollow Sentinel and another creature you control, returning Gulping Scraptrap from your graveyard to the battlefield.
When Gulping Scraptrap enters the battlefield, it and Intruder Alarm trigger.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Gulping Scraptrap trigger, causing you to proliferate.
Venser triggers, creating a legendary 3/3 Hollow Sentinel artifact creature token.
When The Hollow Sentinel enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Repeat.

Infinite mana creatures you control can produce

Infinite untap of creatures

Intruder Alarm

Combos with "Gulping Scraptrap"