[Septimius Severus]

Now if the captain of the death team for instance doesn't mind the blood team having access to the Vampire Queen for instance, who could be given enough death magic during pretender design to cast Tartarian Gate later or earlier in the game without the need for boosters or empowerment and/or forge high level death items, or the captain of the Childen of Crom doesn't mind the supplicants having a pretender such as the Bakemono kunshu, who could be given enough fire magic during pretender design to cast King of Elemental Fire and/or forge high level fire items, or any other high level fire spell once the requisite research has been completed (without the expense of boosters or empowerment), hey you guys are braver than me. I know I would mind.

But that is part of the explanation for the restrictions.