The valuable wand of speed monster is a wand that will make monsters (including your character) speed up. The value of this wand is that it can grant the player (and pets) intrinsic speed when zapped at oneself. Once you have identified this wand and zap yourself with it, the intrinsic speed is permanent. Thereafter, these wands are mostly useful for enhancing pets and steeds. Engraving with a wand of speed monster will give the message "The bugs on the floor speed up!". Even though the message is unambiguous, the wand is not auto-identified. This is left up to the player.