Board Thread:General Discussion/@comment-27907368-20160428221757/@comment-27907368-20160504054543

Honestly, the most compelling details lie with Flowey and Undying/ amalgamates.

Flowey is a SOULless, physical vessel and can manipulate time.

Undying is DETERMINED, a monster (meaning their SOUL is their entire existence), and she returns from death and survives hit after hit when it looks as if she has no HP remaining. She does not manipulate time. Neither do the amalgamates.

We have a spectrum. Unless we're in TP, we only see the ability to manipulate time. This ability is housed in the vessel. The ability to re-fuse is of the SOUL; we know the SOUL to be Frisk in the TP route.