Geometer

The geometer is the master of written magic and spells inscribed within a perfectly rendered diagram.
==== Requirements ====
Skills: Decipher Script 6 ranks , Disable Device 1 ranks , Knowledge (arcana) 6 ranks , Perception 1 ranks
Feats: Scribe Scroll
Spells: Able to prepare and cast 3rd-level arcane spells.
==== Hit die ====
d4
==== Skill points ====
2 + Int
==== Class Features ====
Weapon and Armor Proficiency: Geometers gain no proficiency with any weapon or armor.
Spells per Day/Spells Known: At each level, a geometer gains new spells per day (and spells known, if applicable) as if he had also gained a level in an arcane spellcasting class to which he belonged before adding the prestige class level. He does not, however, gain any other benefit a character of that class would have gained (such as the bonus feat sometimes gained by a wizard). If he had more than one arcane spellcasting class before becoming a geometer, he must decide to which class to add each level for the purpose of determining spells per day and spells known.
Glyph of Warding: A geometer adds glyph of warding to his spellbook as a 3rd-level arcane spell. He can prepare and cast the spell just like any other spell he knows.
Spellglyph (Su): A spellglyph is an arcane diagram that substitutes for a specific spell?s verbal and material components (if any). When a geometer casts a prepared spell in conjunction with a spellglyph scribed for that spell, he can cast the spell as if it were affected by the Silent Spell feat. The spellglyph replaces any material components (other than a focus) normally required by the spell. A geometer chooses at the time of casting whether to use a spellglyph. An expended spellglyph disappears, just like any other material component. Spellglyphs are normally scribed on parchment, much like scrolls. Preparing a spellglyph requires 1 hour and the use of rare inks costing 25 gp per spell level. If the spell normally requires an expensive material component (with a value of more than 1 gp), exotic inks and treatments of equal cost must be used in the preparation of the spellglyph.
Book of Geometry (Ex): At 2nd level and higher, a geometer uses a unique system for recording the details of a spell that drastically reduces the expense of maintaining spellbooks. Every spell he learns from now on requires only a single page in his spellbook. It still takes 24 hours to scribe a spell into a spellbook and materials costing 100 gp per page. A geometers spellbook is difficult for nongeometers to decipher and use. The Spellcraft DC to decipher or prepare spells from a geometers spellbook is increased by 5 for nongeometers (see page 178 of the Players Handbook).
Sigilsight (Ex): A geometer of 3rd level or higher can use a Search check to find magic traps based on runes, glyphs, sigils, symbols, and other writings as a rogue can. He gains a bonus equal to his caster level on all Search checks to find traps of this sort. A geometer who merely comes within 10 feet of a magic rune, glyph, sigil, or symbol, or the threshold of danger for such a device, is entitled to make a Search check as if he were actively searching for a magic trap.
Pass Sigil (Su): Beginning at 3rd level, a geometer can temporarily negate magical wards based on written symbols, sigils, runes, or glyphs. As a standard action, a geometer can attempt to pass such a sigil. He must succeed on a level check (DC 6 + the sigil creators caster level). If successful, he can suppress the effects of the device for as long as he maintains concentration (which might make it possible for others to pass the sigil safely, too). A geometer must be able to see the device to be passed.
Powerful Spellglyph (Ex): When a 5th-level geometer prepares a spellglyph for a spell, he knows how to strengthen the spell beyond its normal effects. His caster level is treated as 1 higher for any spell he casts with the use of a spellglyph.
Greater Glyph of Warding: A 5th-level geometer adds greater glyph of warding to his spellbook as a 6th-level arcane spell. He can prepare and cast the spell just like any other spell he knows
=== Advancement ===
Level	BAB	Fort	Ref	Will	Special 	Spellcasting
1st 	+0 	+0 	+0 	+2 	Glyph of warding, draw spellglyph 	+1 level of existing arcane spellcasting class
2nd 	+1 	+0 	+0 	+3 	Book of geometry 	+1 level of existing arcane spellcasting class
3rd 	+1 	+1 	+1 	+3 	Sigilsight 	+1 level of existing arcane spellcasting class
4th 	+2 	+1 	+1 	+4 	Pass sigil 	+1 level of existing arcane spellcasting class
5th 	+2 	+1 	+1 	+4 	Powerful spellglyph, greater glyph of warding	+1 level of existing arcane spellcasting class
=== Class skills ===
Skill name 	Key ability	Trained only	Armor check penalty
Concentration 	CON 	 	
Craft 	INT 	 	
Decipher Script 	INT 	 	
Disable Device 	INT 	 	
Knowledge (arcana) 	INT 	 	
Knowledge (architecture and engineering)	INT 	 	
Knowledge (dungeoneering) 	INT 	 	
Knowledge (geography) 	INT 	 	
Knowledge (history) 	INT 	 	
Knowledge (local) 	INT 	 	
Knowledge (nature) 	INT 	 	
Knowledge (nobility and royalty) 	INT 	 	
Knowledge (psionics) 	INT 	 	
Knowledge (religion) 	INT 	 	
Knowledge (the planes) 	INT 	 	
Profession 	WIS 	 	
Search 	INT 	 	
Spellcraft 	INT