Erase removes writings of either magical or mundane nature from a scroll or from up to two pages of paper, parchment, or similar surfaces. It removes explosive runes, glyphs of warding, sepia snake sigils, and arcane marks, but it does not remove illusory script or symbols. Nonmagical writings are automatically erased if the character touches them and no one else is holding them. Otherwise, the chance is 90%. Magic writings must be touched, and the character must roll 15+ on a caster level check (1d20 + caster level) to succeed. (A natural 1 or 2 is always a miss on this roll.) If the character fails to erase explosive runes, a glyph of warding, or a sepia snake sigil, the character accidentally activates the runes, glyph, or sigil instead.