Cryptic Trilobite each have at least one +1/+1 counter on them.
Mana Needed
({2} magic symbol) available.
Steps
Activate
Cayth by paying ({2} magic symbol) and tapping it, putting a +1/+1 counter on
Crystalline Crawler and
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
Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding ({U} magic symbol) .
Activate
Freed from the Real's second ability by paying ({U} magic symbol) , untapping