This is now in the "
Pathfinder Basic Pack". Turn on ShadowChemosh Adjustments and add the Spell as "- Custom Spell Weapon -". For full details check the readme file in the above post and look on like page 7 for details.
Please note having some issues where you can't have more than one Pack installed on the iPad at a time. Please also note that the Basic Pack is contained inside of all the other packs.