Commander Masters is the newest entry in Magic: the Gathering's Masters series. Like other Masters products, the Commander Masters set is built with booster draft Limited in mind while also featuring dozens of high-value reprints for draft and Constructed games alike. These powerful reprint cards also raise the power level of Limited in Commander Masters, making it more rewarding for veteran players.
Source:https://www.cbr.com/mtg-command-masters-most-expensive-reprints/