The wand blows open a large area around the target. It damages you, IIRC, and can destroy walls and other things. Specifically, on D:50, there are two levers. When you switch them and walk away, a balor will teleport over and hit them again. So you either have to kill all of the balors on the level (or use another trick), or, once you hit the lever, you can blast it with the wand. This destroys the lever and prevents the balors from switching it back. If you do this to both levers, then the Chaos gate will remain closed indefinitely.
Hoping to win with every class, doomed. Archer, Barbarian, Bard, Beastfighter, Druid, Elementalist, Farmer, Fighter, Monk, and ULE Priest down.