Cayth, Famed Mechanist + Mana Echoes + Singing Bell Strike

Cayth, Famed Mechanist

Mana Echoes

Singing Bell Strike

How it works

1. Activate Cayth by paying 2 and tapping it, creating a token copy of a creature token you control.
2. When the creature token enters the battlefield, Mana Echoes triggers, adding C for each creature you control that shares a creature type with it.
3. Activate Singing Bell Strike by paying 6, untapping Cayth.
4. Repeat.

This loop relies on transforming Cayth, Famed Mechanist into a self-contained engine by feeding its tap ability into a virtuous cycle of mana and tokens. With Mana Echoes on the board, every time Cayth's activated ability creates a Servo or other creature token, it generates an escalating wave of colorless mana that easily covers the {6} cost required to untap Cayth using Singing Bell Strike. Because Singing Bell Strike's ability lets you pay to untap the enchanted creature, you can constantly refresh Cayth's {2} and {T} activation to continuously populate your board, proliferate counters, and repeat the entire sequence indefinitely.