Requires

Cayth, Famed Mechanist must be on the battlefield. Mana Echoes must be on the battlefield. Staff of Domination must be on the battlefield. You control at least one creature token. You control at least five creatures that share a creature type with the creature token. Cayth does not have summoning sickness. Mana needed:

Steps

1. Activate Cayth by paying 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 for each creature you control that shares a creature type with it.
3. Activate Staff of Domination's third ability by paying , untapping Cayth.
4. Activate Staff of Domination's first ability by paying , untapping it.
5. Repeat.

Results