[Raigen.Convict]

Or it could be the reverse? If the summoner dies, all Youkai recover like 50% of their summoner's maximum FP as HP. (assuming Shared Joy won't fuck up the numbers), if a Youkai dies, the summoner recovers (Youkai LV * 2) FP.

Well, reading that one, that sounds interesting since if the summoner has a crapton of youkai fighting for them and hits 0 hp, then it's either a group fight of some sort or the character is pretty strong, strong enough to 1-2 shot youkai meaning I would suppose it could work...Maybe...