The Blood Prince encounter is not your typical council mechanic. Of the three princes, Valanar, keleseth, and taldaram, only valanar will have any health at the begining of the pull. Attacking either of the other two will not actually contribute to defeating the encounter. This is because of the invocation of blood. This ability both marks the target you need to actively be killing as well as empowering that prince.

Every prince has one ability that can be empowered. For valanar it is shock vortex, for