Activate Baylen's first ability by tapping two creature tokens, adding {R}.
Repeat step 1 four additional times.
Activate Aggravated Assault by paying {3}{R}{R}, untapping all creatures you control and causing you to get an additional combat and main phase after this one.
Repeat.

Infinite colored mana

Infinite combat phases

Infinite card draw

Infinite untap of creatures you control

Infinite draw triggers

Infinite mana creatures you control can produce

Infinite +1/+1 counters on a creature

Baylen, the Haymaker

Aggravated Assault

Activate The Unbeatable Squirrel Girl by paying {1}{G}{G}{G}, creating a 1/1 Squirrel creature token for each Squirrel you control.
Activate Baylen's first ability four times by tapping eight Squirrel tokens, adding {1}{G}{G}{G}.
Repeat.

Infinite creature ETB

Infinite creature tokens

The Unbeatable Squirrel Girl

Activate Ant Queen by paying {1}{G}, creating a 1/1 Insect creature token, a Food token, a Clue token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding {G}.
Activate Baylen's first ability by tapping two tokens, adding {1}.
Repeat.
Once you have infinite untapped tokens, you may tap them for infinite mana and forego sacrificing the Treasures, and/or use Baylen's other abilities.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite artifact tokens

Infinite lifegain triggers

Infinite lifegain

Infinite Treasure tokens

Infinite Clue tokens

Infinite Food tokens

Ant Queen

Peregrin Took

Academy Manufactor

Activate Ant Queen by paying {1}{G}, creating four 1/1 Insect creature tokens.
Activate Baylen's first ability twice by tapping the four Insect tokens, adding {1}{G}.
Repeat.

Infinite tapped creature tokens

Parallel Lives

Doubling Season

Activate Propagator Drone by paying {3}{G}, creating three 0/1 Eldrazi Spawn creature tokens.
Activate Baylen's first ability by tapping two Eldrazi Spawns, adding {G}.
Activate the Eldrazi Spawns by sacrificing them, adding {C}{C}{C}.
Repeat.

Combos with "Baylen, the Haymaker"