MTG Prototype Brothers’ War mechanic scales down giant Artifact mechs

War machines will battle on an epic scale within The Brothers’ War, which features a new Magic: The Gathering mechanic called Prototype, able to reduce the cost and power of the Artifacts for flexibility within a match. 

Scheduled to drop on Nov. 11 through prerelease events, The Brothers’ War (BRO) will contain a total of two new MTG mechanics. Artificers and Aritfacts are a predominant theme in the Standard-legal set. The Artificers use Powerstones to enable their creations, one of the new mechanics. And they also have the ability to produce mini versions of their war Mechs through Prototype, the second new mechanic.