Keep an eye out for abilities that interact well with your commander
Galadhrim Ambush Galadhrim Ambush should be a staple in any elfball EDH deck short of cEDH lists
They have an unusual combination of modal and transforming DFC mechanisms in More Than Meets the Eye and can convert between faces once on the battlefield
Andrew Mar The artist behind 120 cards for both the tabletop and Arena versions of Magic, Andrew Mar has also contributed to Games Workshop, Bathesda and Capcom
I really like the ones you mentioned, seems great Vorthos targets for the Lich, a so much valuable object like the Crown it's perfect target haha Following the "empire" cycle you mentioned: Hand of Vecna, Eye of Vecna and The Book of Vile Darkness seem great and flavour objectives
Graz is a 3/2 for three who bounces your blocked creatures, and draws you a card whenever you manage to connect to a player in combat