Commander players may find the cost of this fine artifact rather questionable at 3 mana, but that is not such a high price for being able to generate multiple instances of mana of any color in a single turn.
Relic of Legends will be especially popular in such 5-color lists like Jodah, the Unifier and Sisay, Weatherlight Captain. But it can be just as effective in 3-color or less commander decks as well.
That's all for the best 15 cards in MtG's Dominaria United set. In addition to this list of the best Dominaria United cards for commander, be sure to check out our other MtG guides and card lists here.