Activate Eldrazi Displacer by paying {2}{C}, blinking Supply Runners.
When Supply Runners enters the battlefield, it triggers, putting a +1/+1 counter on each other creature you control.
Activate Workhorse by removing a +1/+1 counter from it, adding {C}.
Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Repeat.

Infinite +1/+1 counters on most creatures you control

Infinite creature ETB

Infinite creature LTB

Supply Runners

Workhorse

Cryptic Trilobite

Eldrazi Displacer

Activate Eldrazi Displacer by paying {2}{C}, blinking Supply Runners.
When Supply Runners enters the battlefield, it triggers, putting a +1/+1 counter on each other creature you control.
Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {1}.
Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Repeat.

Crystalline Crawler

Activate Supply Runners by paying {1}{U}, blinking itself.
When Supply Runners enters the battlefield, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Deadeye Navigator trigger, repairing it and Supply Runners.
Resolve the Supply Runners trigger, putting a +1/+1 counter on each other creature you control.
Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {U}.
Activate Workhorse by removing a +1/+1 counter from it, adding {C}.
Repeat.

Deadeye Navigator

Activate Emiel by paying {3}, blinking Supply Runners.
When Supply Runners enters the battlefield, it triggers, putting a +1/+1 counter on each other creature you control.
Activate Workhorse by removing a +1/+1 counter from it, adding {C}.
Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Repeat.

Emiel the Blessed

Activate Supply Runners by paying {1}{U}, blinking itself.
When Supply Runners enters the battlefield, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Deadeye Navigator trigger, repairing it and Supply Runners.
Resolve the Supply Runners trigger, putting a +1/+1 counter on each other creature you control.
Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {U}.
Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Repeat.

Infinite colorless mana that can only be spent to activate abilities

Activate Emiel by paying {3}, blinking Supply Runners.
When Supply Runners enters the battlefield, it triggers, putting a +1/+1 counter on each other creature you control.
Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {1}.
Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Repeat.

Combos with "Supply Runners"