Improvised Arsenal + Mana Echoes + Chishiro, the Shattered Blade + Prismite

Improvised Arsenal

Mana Echoes

Chishiro, the Shattered Blade

Prismite

How it works

1. Activate Improvised Arsenal by paying 4, creating a token copy of it.
2. Chishiro triggers, creating a creature token.
3. When the creature token enters, Mana Echoes triggers, adding C for each creature you control that shares a creature type with the creature token.
4. If needed, activate Prismite by paying 2, adding .
5. Repeat.

This loop sets up an explosive feedback cycle between your artifacts and creatures by leveraging Chishiro, the Shattered Blade to bridge the two card types. Whenever you activate Improvised Arsenal to create another copy of the Equipment, Chishiro's ability steps in to spawn a 2/2 red Spirit creature token. That new creature triggers Mana Echoes, generating a growing pool of colorless mana with each iteration since the Spirits all share the same creature type. If that colorless energy needs filtering into red to keep paying the Arsenal's activation cost, Prismite is right there to convert it cleanly.