Cryptic Trilobite has at least one +1/+1 counter on it.
Mana Needed
({1} magic symbol) available.
Steps
Activate
Together Forever by paying ({1} magic symbol) , targeting
Cryptic Trilobite.
Activate
Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding ({C} magic symbol) ({C} magic symbol) that can only be spent to activate abilities.
Cryptic Trilobite dies as a state-based action due to having zero toughness.
Together Forever triggers, returning
Cryptic Trilobite from your graveyard to your hand.
Cast
Cryptic Trilobite, choosing one for ({X} magic symbol) , but paying ({0} magic symbol) due to
Ugin.
Repeat.
Results
Infinite colorless mana that can only be spent to activate abilities.