Cryptic Trilobite has at least two +1/+1 counters on it.
Mana Needed
({3} magic symbol) available.
Steps
Activate
Emiel by paying ({3} magic symbol) , blinking
Deepglow Skate.
Deepglow Skate enters the battlefield, doubling the number of counters on
Cryptic Trilobite.
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.
Repeat.
Results
Infinite blinking.
Infinite ETB.
Infinite LTB.
Infinite proliferate.
Infinite colorless mana that can only be spent to activate abilities.