Most likely... But if he were to start attacking, the demon lords energy would attempt to change him into a MG. If that would be the case (Since 682 can mutate and adapt) His body would try to adapt and either be immune to the demonic energy or try to control it.
Possible outcomes:
He turns into a MG and becomes a new type of lizardman.
He attempts to end life as fast as possible and uses mutations to avoid becoming an MG.
He is "neutralized" by a powerful magical beings such as a Baphomet or Lilim.
The Foundation could get involved and contain 682 with the help of the MG's.
Thee are MANY outcomes and 682 is unpredictable. Especially when it comes to new beings.