| Ipslore the Red |
It's flavorfully great, but mechanically, less so. Blood travel is about as nice as transposition, giving up shield ally hurts a bit, Blood Possession comes online way too late, and the DC targets what's usually a good save. Planar binding is nice, but even as a standard action you still need to bargain, making it as useless as the normal version for combat, and in play it's not as broken as in theory. Especially if you don't want to have to use evil outsiders.