Mox Amber
Legendary Artifact
: Add one mana of any color among legendary creatures and planeswalkers you control.
"A crystallized moment in time from the Mending Era, first discovered during the Ice Age. A temporal conundrum, even to the great scholar himself." —*The Discoveries of Feldon*
Illustrated by
The Brothers' War Retro Artifacts#98MythicEnglishLegality
Rulings
Mox Amber’s ability adds one mana of the color of your choice from among the colors of legendary creatures and planeswalkers you control. It doesn’t add one mana of each of those colors.
If you control no legendary creatures or planeswalkers, you can activate Mox Amber’s ability, but you won’t add any mana.
If your legendary creatures and planeswalkers are all colorless, you can activate Mox Amber’s ability, but you won’t add any mana. Colorless is not a color.