MScore: 9.9/10
Mox Amber
Legendary Artifactmythic
: Add one mana of any color among legendary creatures and planeswalkers you control.
A moment in time made tangible, it has the power to realize epic visions.
Illustrated by Steven Belledin · Dominaria · #224
Rulings for Mox Amber
3
2018-04-27
Mox Amber's ability adds one mana of the color of your choice from among the colors of legendary creatures and legendary planeswalkers you control. It doesn't add one mana of each of those colors.
2018-04-27
If you control no legendary creatures or legendary planeswalkers, you can activate Mox Amber's ability, but you won't add any mana.
2018-04-27
If your legendary creatures and legendary planeswalkers are all colorless, you can activate Mox Amber's ability, but you won't add any mana. Colorless is not a color.
, 
