Tekuthal has at least one indestructible counter on it, and at least one +1/+1 counter on it.
Steps
Activate
Tekuthal using
Myojin of Towering Might's ability by removing an indestructible counter from it, putting five +1/+1 counters on
Cryptic Trilobite, and three +1/+1 counters on any creature you control.
Activate
Cryptic Trilobite's first ability twice by removing two +1/+1 counters from it, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) that can only be spent to activate abilities.
Activate
Tekuthal by paying ({3} magic symbol) and removing three +1/+1 counters from
Cryptic Trilobite, putting an indestructible counter on it.
Repeat.
Results
Infinite +1/+1 counters.
Infinite colored mana that can only be spent to activate abilities of creatures you control.
Infinite colorless mana that can only be spent to activate abilities.