Yawgmoth, Thran Physician + Voidwing Hybrid + Cryptic Trilobite + Chromatic Orrery

Yawgmoth, Thran Physician

Voidwing Hybrid

Cryptic Trilobite

Chromatic Orrery

How it works

1. Activate Yawgmoth's second ability by paying 2 and discarding Voidwing Hybrid, causing you to put a +1/+1 counter on Cryptic Trilobite.
2. Voidwing Hybrid triggers, returning itself from your graveyard to your hand.
3. Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding 2 that can only be spent to activate abilities.
4. Repeat.