Saheeli, the Sun's Brilliance + Mana Echoes + Zealous Conscripts + Prismite

Saheeli, the Sun's Brilliance

Mana Echoes

Zealous Conscripts

Prismite

How it works

1. Activate Saheeli by paying and tapping it, creating a token copy of Zealous Conscripts with haste.
2. When the token Zealous Conscripts enters the battlefield, it and Mana Echoes trigger.
3. Resolve the Zealous Conscripts trigger, untapping Saheeli.
4. Holding priority, if you control less than four creatures that share a creature type with Zealous Conscripts, repeat steps 1 through 3 one additional time.
5. Resolve all Mana Echoes triggers, adding C for each creature you control that shares a creature type with Zealous Conscripts for each trigger resolved this way.
6. Activate Prismite twice by paying 4, adding .
7. Repeat.