Your mysticism serves to bring out your magical bloodline and makes your bloodline spells more versatile and powerful.
Benefit: Your levels in mystic theurge count as levels of sorcerer for purposes of determining which bonus bloodline spells you know. Additionally, you may prepare and cast your sorcerous bloodline spells using your divine spellcasting ability without using up a spell slot one level higher than normal. Finally, your levels in all divine spellcasting classes are added to your sorcerer caster level when casting spells from your sorcerous bloodline, regardless of whether you prepared them or cast them spontaneously.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.