Cryptic Trilobite has at least three +1/+1 counters.
Steps
Activate
Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding ({C} magic symbol) ({C} magic symbol) .
Activate
Ghave's first ability by paying ({1} magic symbol) and removing a +1/+1 counter from
Cryptic Trilobite, creating a 1/1 Saproling creature token.
Activate
Ghave's second ability by paying ({1} magic symbol) and sacrificing the Saproling token.
Mazirek triggers, putting a +1/+1 counter on each creature you control.
Resolve the
Ghave ability, putting a +1/+1 counter on
Cryptic Trilobite.
Activate
Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding ({C} magic symbol) ({C} magic symbol) .
Activate
Ghave's first ability by paying ({1} magic symbol) and removing a +1/+1 counter from any creature you control, creating a 1/1 Saproling creature token.
Repeat from step 3.
Once you have infinite +1/+1 counters on
Cryptic Trilobite, you may activate
Ghave's first ability an infinite number of times to get infinite Saproling tokens.