I think the power to inheritance to be king is hiden inside lidusis. It was mentioned previously that Rubis or the horned girl was supposed to inherit that power, but it was stolen and that stolen power is inside lidusis. I don't think it's a split of Raven's power per se, but more of an extra something that defines who ever who has the power as King? Raven in his own right is very powerful, and is recognized as such, hence Rood is also very powerful. Think of it like the Avatar, power of all four elements (recognized as the avatar because of this) + avatar state (which can be passed on to the next avatar- that extra something that defines and what makes them the avatar) lmao