Dungeon Master's Tome

Written in language of DM's choice. If you can
read language, you can ask book for a hint about
a puzzle or enemy. Roll d20. +2 bonus for 5d4
psychic damage. Results: {c}1-5: You cannot find anything useful, take 5d10 psychic damage. {c}6-12: DM gives a vague hint about a small part
of the puzzle or a stat about an enemy. {c}13-19:
DM reveals dmg. vuln., resist., or imm. of enem.,
or clear hint about a puzzle. {c}20: DM reveals
entire stat block or many cle