Ghave, Guru of Spores + Cryptic Trilobite + Sigil Captain

Ghave, Guru of Spores

Cryptic Trilobite

Sigil Captain

How it works

1. Activate Cryptic Trilobite's first ability by removing two +1/+1 counters from it, adding CCCC.
2. Activate Ghave's first ability by paying 1 and removing a +1/+1 counter from Cryptic Trilobite, creating a 1/1 Saproling creature token.
3. The Saproling enters the battlefield, triggering Sigil, putting two +1/+1 counters on the Saproling.
4. Activate Ghave's first ability by paying 1 and removing a +1/+1 counter from a Saproling, creating a 1/1 Saproling creature token.
5. The Saproling enters the battlefield, triggering Sigil Captain, putting two +1/+1 counters on the Saproling.
6. Activate Ghave's second ability by paying 1 and sacrificing a Saproling token, putting a +1/+1 counter on Cryptic Trilobite.
7. Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding CC.
8. Repeat from step 4.