Robe of the Petimagi - Minor Wondrous Item

Robe of the Petimagi: This normal-appearing garment can be white (01-45 on d%, good alignment), gray (46-75, neither good nor evil alignment), or black (76-100, evil alignment). Its wearer, if an arcane spellcaster, gains the following powers.

• +1 armor bonus to AC.
• +1 resistance bonus on all saving throws.
  
• +1 damage to all damage dealing spells cast.

Weak varied; CL 3rd; Craft Wondrous Item, Spell Focus, mage armor or shield of faith; Price 4,000 gp; Weight 1 lb.

NPC Gear: 8th Treasure Value: 9th

Math:

Armor bonus: 1*1*1000
+1 resistance bonus: 1*1*1000 plus %50 multiple different
+1 damage to all spells that deal direct damage: 300*2, as masterwork bonus doubled for breadth of utility, +50% for multiple different

2,600 gp if using prices as per Magic Item Compendium