Saheeli, the Sun's Brilliance + Mana Echoes + Mycosynth Lattice + Bounding Krasis

Saheeli, the Sun's Brilliance

Mana Echoes

Mycosynth Lattice

Bounding Krasis

How it works

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