Myojin of Towering Might in exile (Myojin of Towering Might exiled by Agatha's Soul Cauldron).
All other permanents on the battlefield.
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.