Prototype Portal + Dross Scorpion + Woe Strider + Cathodion

Prototype Portal

Dross Scorpion

Woe Strider

Cathodion

How it works

1. Activate Prototype Portal by paying 3 and tapping it, creating a token copy of Cathodion.
2. Activate Woe Strider by sacrificing Cathodion.
3. When Cathodion dies, Cathodion and Dross Scorpion trigger.
4. Resolve the Cathodion trigger, adding CCC.
5. Resolve the Dross Scorpion trigger, untapping Prototype Portal.
6. Resolve the Woe Strider ability, scrying 1.
7. Repeat.