Imp (summon)

Small but insidious devils often bound to the service of sorcerers and wizards, imps have a gleeful attraction to pranks, riddles, and bawdy jokes.

Special abilities
This imp has damage reduction 10/+1, fire resistance 20/-, and spell resistance 10, as well as immunity to poison. This creature regenerates 2 hit points per round.

This imp can cast magic missile at caster level 5 twice per day, and invisibility at caster level 6 thrice per day. It also has use of its fire bolt five times per day.