Fantasy Monster: Glyph-Eater

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Glyph-Eater
A weird amalgamation of a big squid and a snail, bearing a shell of scintillating, yet translucent plates of force.

CR 10; XP 9,600
N Large Aberration
Init +8; Senses darkvision 60 ft., glyph-finding 60 ft.; Perception +22

Defense
AC 24, touch 14, flat-footed 19 (+4 Dex, +1 dodge, +6 natural, +4 shield, –1 size)
hp 127 (15d8+60)
Fort +9, Ref +9, Will +13
SR 21 vs glyphs, runes, symbols, and magical traps

Offense
Speed 20 ft., climb 20 ft., swim 20 ft.
Melee 4 tentacles +15 (2d6+4)
Space 10 ft.; Reach 10 ft.
Spell-Like Abilities (CL 15th; concentration +17)
Constant—shield

Statistics
Str 18, Dex 18, Con 18, Int 13, Wis 19, Cha 15
Base Atk +11; CMB +16; CMD 34 (can't be tripped)
Feats Acrobatic Steps, Blind-Fight, Combat Reflexes, Defensive Combat Training, Improved Initiative, Nimble Moves, Run, Weapon Focus (tentacle)
Skills Climb +12, Escape Artist +22, Knowledge (arcana) +19, Perception +22, Spellcraft +19, Stealth +18, Swim +12
Languages understand Aklo, can't read

Ecology
Environment ruins
Organization solitary, or pair
Treasure standard (inks and mother-of-pearl that are suitable for inscribing spells, creating scrolls, glyphs, runes, symbols, and similar magical writings

Glyph-Eating (Su) A glyph-eater can consume a single glyph, rune, sigils, symbol, scroll, or a page from a spellbook as a full-round action that provokes attacks of opportunity. If the consumed effect is a glyph, rune, sigil, symbol, or similar magical effect, glyph-eater makes a caster level check using its HD as if a targeted greater dispel magic was cast on the glyph, destroying the glyph in the process. Scrolls and spellbook pages are simply consumed without need for a check.

Glyph-Finding (Su) A glyph-eater can instinctively sense magical glyphs, runes, symbols and similar magical traps from 60 feet, making a Perception check to detect them when approaching them. Additionally, whenever glyph-eater would trigger such magical trap, but the effect fails to penetrate glyph-eater's specialized Spell Resistance, the effect doesn't trigger at all.

Relentless, if not particularly fast moving devourers of magical glyphs, runes, sigils, and symbols, glyph-eater are sapient though weirdly alien entities that feed on magic bound in signs and letters. While they strongly prefer to eat active magical effects, they can sustain themselves by eating scrolls or tearing pages from spellbooks—each effect, scrolls, or page feeds glyph-eater for a day, but they will gorge for weeks, months, or even years of available nutrition, given a chance.