The Prismatic Mirror will reflect all types of attacks except for physical! You can only equip one of these.
This is a 1-player BD item used by King Skarl, the Spectre of Lord Darigan and The Castle Defender in the Champions of Meridell plot, Lord Kass in the Battle for Meridell plot, Mayor Thumburt (all forms) in the Tale of Woe plot, Oblivion in the Faeries' Ruin plot, the Neggbreaker in the Mysterious Negg subplot of the 2012 Festival of Neggs, and the Giant Ghostkerchief, the Neggbreaker, and Turmaculus.