Welrynt Weapons power source

[No_Nick_Needed]

The original Ultima Weapon ran on the Heart of Sabik.

Considering how they had multple Weapons, based off of the Ultima Weapon, I think we can rule out the possibility of all of them being powered by the Heart, but what are they running on?

Do we have any information on this topic?
Did they manage to copy the Hearth of Sabik, or did they find some other, succifiencly strong power source?
If it's the former, I do wonder if they managed to fully copy it, including the corrupting effect we later learned of in the Pandaemonium series.

[Cilia]

The Weapons were powered by synthetic auracite, into which combat data of various legates was loaded. (Except for the Diamond Weapon, which seems to have had a copy of Alphonse's mind copied into it wholesale.)

[Cleretic]

(Except for the Diamond Weapon, which seems to have had a copy of Alphonse's mind copied into it wholesale.)

If we follow Valens' implication, and Gaius' reaction to said implication, and then couple it with the fact that fight was specifically borrowing some notes form Iron Blooded Orphans...

Not a copy.