Attune Gem

Type of Feat: Item Creation
Prerequisite: Intelligence 13, Arcane Spells level 2.
Specifics: You can cast any arcane spell you have prepared as a gem. The caster must have the spell memorized to be able to create the gem. Crafting a gem costs Spell level * Caster level * 50 in gold pieces for a normal caster (half base cost). It also takes XP equal to 1/25th of the base cost. If you cannot pay the casting cost or the XP loss would drop you a level, the crafting will fail, and the spell will be lost. Crafting the gem requires a gem with a value of 50gp * spell level. A gem is permanent until used. Gems target those who activate them.
Use: Selected.