Actually, while his card only does dead things, he is just a powerful, influential shapeshifter. He doesn't have to be disguised as someone dead, or even someone who ever existed. On the other hand, he is likely to have someone killed before he disguises himself as them.
*Yes, there is such a thing as "too Vorthos".
*In an Eldraine campaign, I may not take the flaw "Convinced everyone else is an elk."