Marath by paying ({1} magic symbol) and removing a +1/+1 counter from it, giving itself two +1/+1 counters.
Activate
Marath by paying ({1} magic symbol) and removing a +1/+1 counter from it, giving
Cryptic Trilobite two +1/+1 counters.
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.
Repeat for infinite +1/+1 counters on
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.
Activate
Marath's ability by paying ({1} magic symbol) and removing a +1/+1 counter from it, giving itself two +1/+1 counters.
Repeat from step 5 to get infinite ({C} magic symbol) that can only be spent to activate abilities and to put infinite +1/+1 counters on
Marath, with which you can use to activate
Marath's ability infinite times.
Results
Infinite +1/+1 counters.
Infinite colorless mana that can only be used to activate abilities.