Cayth, Famed Mechanist + Mana Echoes + Little Bear

Cayth, Famed Mechanist

Mana Echoes

Little Bear

How it works

1. Activate Cayth by paying 2 and tapping it, creating a copy of the Little Bear token.
2. When the Little Bear token enters the battlefield, it and Mana Echoes trigger.
3. Resolve the Little Bear trigger, untapping Cayth
4. Resolve the Mana Echoes trigger, adding C for each creature you control that shares a type with the Little Bear token.
5. Repeat.

This loop relies on a clever botanical and mechanical assembly line to generate infinite colorless mana and an endless army of creatures. Cayth, Famed Mechanist is the engine's heart, granting fabricate 1 to your other nontoken creatures while its activated ability populates your board. When Little Bear flashes in to untap Cayth, Mana Echoes watches every new creature hit the battlefield and pours out a flood of colorless mana based on shared creature types. By cycling Little Bear in and out with the help of Cayth's activation, the mana scales exponentially with each iteration, fueling the entire sequence for as long as you desire.