Ritualists

Quick question:

If you have the trait Death Worship (and are empire ofc) ... can you train Ritualists?

Or, perhaps ... I suppose what I am really asking is if there is a way for trained units (by the AI/player) to summon death demons

(ofc, if a champ can do so with appropriate spell level, let me know certainly! But extra curious if Ritualists/ trained units can do so- for the playable factions)