Put a +1/+1 counter on Lonis.
Lonis' first ability triggers, creating a Clue artifact token.
When the Clue enters the battlefield, Yotian Dissident triggers, putting a +1/+1 counter on Lonis.
Repeat from step 2.

Infinite artifact tokens

Infinite Clue tokens

Infinite +1/+1 counters on creatures you control

Lonis, Genetics Expert

Yotian Dissident

Activate Ashnod's Altar by sacrificing Lesser Masticore
When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When Lesser Masticore enters, Yotian Dissident triggers, putting a +1/+1 counter on Lesser Masticore
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite colorless mana

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Ashnod's Altar

Lesser Masticore

Cast Animation Module by paying {1}.
When Animation Module enters, Yotian Dissident triggers, putting a +1/+1 counter on it.
Animation Module triggers. Holding priority, activate Urza's first ability by tapping an artifact you control, adding {U}.
Resolve the Animation Module trigger, causing you to pay {1} to create a 1/1 Servo artifact creature token.
When the Servo enters, Yotian Dissident triggers, putting a +1/+1 counter on it.
Repeat from step 3.

Infinite tapped creature tokens

Urza, Lord High Artificer

Animation Module

Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
Cast Sensei's Divining Top from the top of your library by paying {0} and removing a counter from a creature you control.
When Sensei's Divining Top enters, Yotian Dissident triggers, putting a +1/+1 counter on Yotian Dissident.
Repeat.

Near-infinite artifact ETB

Near-infinite artifact LTB

Infinite card draw

Infinite draw triggers

Near-infinite storm count

Falco Spara, Pactweaver

Sensei's Divining Top

Etherium Sculptor

Activate Xavier Sal by tapping it and removing a counter from a permanent you control, creating a copy of an artifact creature token you control.
When the creature token enters the battlefield, Intruder Alarm and Yotian Dissident trigger.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Yotian Dissident trigger, putting a counter on it.
Repeat.

Infinite creature tokens

Infinite untap of creatures

Infinite mana creatures you control can produce

Infinite copies of creature tokens you control

Xavier Sal, Infested Captain

Intruder Alarm

Put a +1/+1 counter on Berta.
Berta and Animation Module trigger.
Resolve the Berta trigger, adding {1}.
Resolve the Animation Module trigger, causing you to pay {1} to create a 1/1 Servo artifact creature token.
When the Servo enters, Yotian Dissident triggers, putting a +1/+1 counter on Berta.
Repeat from step 2.

Infinite +1/+1 counters on a creature

Berta, Wise Extrapolator

Activate Thopter Squadron's first ability by paying {1} and removing a +1/+1 counter from it, creating a 1/1 Thopter artifact creature token.
When the Thopter enters, Yotian Dissident triggers twice due to Elesh Norn, putting a +1/+1 counter on Thopter Squadron and Crystalline Crawler.
Activate Crystalline Crawler by removing a +1/+1 counter from it, adding {1}.
Repeat.

Thopter Squadron

Crystalline Crawler

Elesh Norn, Mother of Machines

Cast Arcbound Reclaimer by paying {4}.
When Arcbound Reclaimer enters the battlefield, Yotian Dissident and Sarinth Steelseeker trigger.
Resolve the Yotian Dissident trigger, putting a +1/+1 counter on Arcbound Reclaimer.
Holding priority, activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting an artifact creature card from your graveyard onto the top of your library.
Resolve the Sarinth Steelseeker ability, putting the artifact creature card from the top of your library into your graveyard.
Unshakable Tail triggers, creating a Clue token.
When the Clue enters the battlefield, Yotian Dissident and Sarinth Steelseeker trigger.
Repeat from step 3.

Sarinth Steelseeker

Arcbound Reclaimer

Unshakable Tail

Deal combat damage using Ant-Man, triggering its ability, creating at least five Treasure tokens.
When the Treasures enter, Yotian Dissident triggers that many times, putting at least five +1/+1 counters on Sage of Hours.
Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
Repeat each turn.

Infinite turns

Lock

Ant-Man, Elusive Avenger

Sage of Hours

Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to the creature with indestructible.
Sonic's second ability triggers, creating a tapped Treasure token.
When the Treasure enters the battlefield, Yotian Dissident triggers, putting a +1/+1 counter on Walking Ballista.
Repeat.

Infinite tapped Treasure tokens

Sonic the Hedgehog

Walking Ballista

Cast Arcbound Reclaimer by paying {4}.
When Arcbound Reclaimer enters the battlefield, Yotian Dissident and Golbez trigger.
Resolve the Yotian Dissident trigger, putting a +1/+1 counter on Arcbound Reclaimer.
Holding priority, activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting an artifact creature card from your graveyard onto the top of your library.
Resolve the Golbez ability, putting the artifact creature card from the top of your library into your graveyard.
Unshakable Tail triggers, creating a Clue token.
When the Clue enters the battlefield, Yotian Dissident and Golbez trigger.
Repeat from step 3.

Golbez, Crystal Collector

Combos with "Yotian Dissident"