Nyx Lotus

尼兹莲花 (Nyx Lotus) (zhs)

Legendary Artifact (CMC 4)
Nyx Lotus enters the battlefield tapped.
: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)