Ancalagon
Dusty Dragon
The ruling that turned me off SA permanently is that if someone dies and is transformed into an undead, and the undead is then destroyed and revivify cast on the remains... you bring back the undead. As an undead. Apparently this constitutes "returning to life."
If your body/soul has been tainted by undeath, revivify isn't going to be able to fix that. A more powerful spell is needed. I would rule that revivify would not work at all personally, but you can't use animate dead to circumvent the time limit on revivify.
Now if all of this happened within a minute? ... maybe? depends on the undead?