“Before this lovely little item, we used that ghastly warp powder. It worked well enough, but would completely exhaust whoever used it. What's the use of someone traveling anywhere they wish if they're too exhausted to do anything afterward? It'd take a very strong soldier to withstand the powder's side effects.” —Lekain
Warp Powder is a mysterious object possessed by the Black Knight, which allows the user to teleport to places nearby or far. According to Vice-Minister Lekain, it uses up the user's energy and was a stage in the development of the Rewarp Staff, which lacks the Warp Powder's drawbacks.
In Fire Emblem: Radiant Dawn, it appears as an unused item with 1 Use and a Worth of 10,000G. It is unknown as to what happens when a character uses it (if it's even possible).