I don't really buy the idea pulling out the engine would have to kill her. I mean, we know for a fact it has to be possible to pull out what's in someone's chest and replace it with an infernal engine of some sort without killing them- if it wasn't, we couldn't possibly have Karlach alive with an engine in her chest instead of a heart. Frig, she just straight up shoves upgrades for it into her chest without serious trouble on two different occasions
It's been a while since I played which is why I ask. I'm not sure about it, but her engine can't be pulled out (and then replaced) because she'll die without it, otherwise why can't she just do it before the thing explodes? And her heart was replaced by Zariel who's like archdevil with godlike powers so she can bypass many rules. As for Dammon, yeah, he shoves upgrades, but he doesn't pull out the engine which is the key here, he upgrades something that already works inside her, but can't fix it permanently. Which is also why steel watcher tells her that her engine can't be fixed and she should go to have it dismantled. With all that mind I would assume that even if Gondians have better version of her engine, they don't have a way of actually putting it in her to replace the old one without killing her. Correct me if I messed up some details
