Scroll of magic mapping

The scroll of magic mapping maps the entire current level, providing the scroll is not cursed, the level is mappable, and you are not confused.

Identification
This scroll self-identifies when read.

Messages

 * "Your mind is filled with crazy lines!":The level is non-mappable
 * "Your spins in bewilderment.":The level is non-mappable, and you are not hallucinating
 * "Wow! Modern art.":The level is non-mappable, and you are hallucinating
 * "A map coalesces in your mind!":The scroll was non-cursed
 * "A map coalesces in your mind! Unfortunately, you can't grasp the details."
 * The scroll was cursed

Strategy
These scrolls are a good way to map Gehennom, and, considering their utility, are surprisingly cheap to write with magic markers.