This is my least favourite plot hole.
- You can easily kill Lucian. Ascend. Do it yourself.
- Malady could do it all. Wouldn't cost her either, because of the literal ocean of source.
- Dallis could've done it. Maybe. Make more sense either way.
The other glaring issue ...
It is massively obvious, the Genocide did not need to happen. Meister Seiva. Partially drained to the point of normality - never to grow again. Never brought up.