Absorb Magic (Su): Nishruus feed on magic. They absorb any magical energy that comes in contact with their bodies, including spells targeted on them, magic items they envelop, and even spellcasters engulfed within their misty forms. This unusual diet has the following effects.

• If a nishruu is the target of a spell that deals hit point damage, it absorbs the spell and permanently gains hit points equal to the damage it would otherwise have dealt. The only exceptions are cold and fire spells, which deal damage (reduced, in the case of cold spells) and then dissipate after 1 round.
• If a nishruu is the target of a non-damaging spell, it absorbs the spell and gains 1 hit point per spell level.
• If a magic item that has charges is in contact with a nishruu, the creature drains 1d4 charges upon initial contact and a like amount every other round thereafter.
• If a nishruu is in contact with a magic item that does not have charges, the effects of the item are negated for as long as it remains in contact with the nishruu and for 1d4 rounds afterward.
• If a character enveloped within a nishruu attempts to use a temporary item such as a potion or scroll, the effect does not initiate until 1d4 rounds after the user leaves the nishruu's body.
• Artifacts do not operate while in contact with a nishruu and for 1 round thereafter.
• A spellcaster (arcane or divine) loses one prepared spell or spell slot, determined randomly, upon initial contact with a nishruu. Each round thereafter that two remain in contact, the spellcaster loses one additional randomly selected spell. Each time she loses a spell in this manner, she must make a DC 15 Will save or suffer the effects of a feeblemind spell. The save DC is Charisma-based.