Cloning
Would those in possession of such technology/magic use it to control/replace their puppets?
Fake the lifespan/recovery of leaders/puppets?
Fake the discovery of 'important' 'remains'?
Obviously to all.
Thus it is not just young blood/adrenochrome/'walnut sauce' that should be considered when digging on the 'ageless' famous/'elite'. Cloning is real. Nazis- Boys from Brazil - were doing experiments based on ANCIENT wisdom/magic they found and remained in relentless pursuit of. (The true nature of global archeology is the pursuit of SPELLS/magic and associated relics.)
Additionally, add the spirit invocation practice of abramelin magic aka goetia aka voodoo to cloning/CRISPR to consciousness 'uploads and programming'…
Who is REALLY who?