I have a question: Can ascended vampire Astarion bite Karlach and make her a spawn?
He can’t bite her at first because she’ll burn him, but he should be able to after the upgrades.
When I took Karlach with me to Cazador's fight every bat that tried to bite her immediately burnt to death, so I have a big suspicion that the upgrade only helps her external temperature.
That's if we're ignoring the "not being able to explore options" part.
(Also, from what I've heard about ascended Astarion's attitude, I'm not quite sure Karlach would even want a (yet another) master over her like that.)
This is what I was thinking too. Karlach already suffered for ages under the tyranny of a demon master, she would probably not accept being under astarion as her master. Now I got a question tho, Im not very well knowledgeable in DnD, but how would Karlach becoming a spawn would make the engine go away?? Would it stop working if she died and came back as a spawn or would it just explode??
