Activate a Clue by paying ({2} magic symbol) and sacrificing it.
Lonis' second ability and
Tarrian's Soulcleaver trigger.
Resolve the
Lonis trigger, putting a +1/+1 counter on
Cryptic Trilobite.
Resolve the
Tarrian's Soulcleaver trigger, putting a +1/+1 counter on
Lonis.
Lonis' first ability triggers, creating a Clue artifact token.
Resolve the Clue ability from step 1, causing you to draw a card.
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.