The Secret Revealed (spell)

Unique spell cast by consuming charges of The Secret Revealed (item).

Gameplay
Effect details:
 * 4d8 magic vs. undead (Save vs. Wand for half)
 * Miscast Magic on undead (80% casting failure, no save, no dispel)
 * Remove Combat & Special spell type protections on undead
 * Remove BDLICH.itm, a non-droppable ring equipped on liches in, which grants:
 * Un-targetable by summoned demons
 * 90% resistances to cold and electricity
 * Immunity to normal weapons
 * Immunity to lv 1-3 spells, in addition to Holy Smite, Skull Trap, Call Lightning, Cloudkill, Silence, 15' Radius, Unholy Blight, Glyph of Warding, Web, Stinking Cloud, Entangle, Sphere of Chaos, Polymorph Other
 * Immunity to sleep, power-word-sleep, slay, paralyze, polymorph, hold, disintegrate