Each EP of Supply represents an assortment of ordinary traveling and camp goods stored on a mount, cart, wagon, or at camp. When a reasonable need arises, expend Supply to produce that many EP of incidental goods that could have been packed beforehand.
Supply cannot produce specialized adventuring tools, weapons, armor, valuable spell components, or objects intended to solve an immediate dungeon obstacle. See Mounts, Transport, and Supply in Chapter 6 for the complete rules.