The Blodeuwedd (fey plains creature, sort of plain dryad) has too high a concentration score, I think:
Spell-like abilities (CL 12th, concentration +21)
Their spellcasting ability is Charisma, according to the spell DCs (Cha 18 for a +4), and they have Combat Casting, but that's normally not added into the concentration score as it only applies to defensive casting.
They have 7 HD, but that should not matter, right?
Am I missing something, or shoud they have concentration +16?