Cast Cryptic Trilobite by paying {0}, causing it to enter the battlefield with a number of +1/+1 counters equal to the number of ingredient counters on Communal Brewing.
If Cryptic Trilobite has more than one +1/+1 counter on it, activate it by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Activate Together Forever by paying {1}, targeting Cryptic Trilobite.
Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
If Cryptic Trilobite doesn't have a +1/+1 counter on it, it dies as a state-based action due to having 0 toughness.
If Cryptic Trilobite died, Together Forever triggers, returning Cryptic Trilobite from your graveyard to your hand.
Repeat from step 4 as needed until Cryptic Trilobite is in your hand.
Repeat from step 1.

Infinite creature LTB

Infinite creature ETB

Infinite death triggers

Infinite storm count

Infinite colorless mana that can only be spent to activate abilities

Cryptic Trilobite

Together Forever

Communal Brewing

Cast Crystalline Crawler by paying {4}, using as many different colors of mana as possible.
Communal Brewing triggers, causing Crystalline Crawler to enter with at least two additional +1/+1 counters on it.
Resolve the Crystalline Crawler spell, causing it to enter with a number of +1/+1 counters.
Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {G}.
Repeat step 4 until Crystalline Crawler has no +1/+1 counters on it, adding as many colors of mana as possible.
Activate Temur Sabertooth by paying {1}{G}, returning Crystalline Crawler from the battlefield to your hand.
Repeat.

Infinite colored mana

Infinite blinking

Crystalline Crawler

Temur Sabertooth

Cast Workhorse by paying {6}, causing it to enter the battlefield with four +1/+1 counters plus an additional +1/+1 counter of each ingredient counter on Communal Brewing.
Activate Workhorse by removing a +1/+1 counter from it, adding {C}.
Activate Together Forever by paying {1}, targeting Workhorse.
Repeat step 2 until Workhorse dies as a state-based action due to having 0 toughness.
When Workhorse dies, Together Forever triggers, returning Workhorse from your graveyard to your hand.
Repeat.

Infinite colorless mana

Workhorse

Combos with "Communal Brewing"