Saheeli, the Sun's Brilliance + Mana Echoes + Chromatic Orrery + Little Bear

Saheeli, the Sun's Brilliance

Mana Echoes

Chromatic Orrery

Little Bear

How it works

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