Theory Bay: Ouroboros in HP? (Pretty long!)

[say543]

No: HPFGUIDX 78379

This (or a version of this) is currently being debated in the Chamber
of Secrets forums but that is closed know so I brought it here to see
what everyone would make  of it.

The theory is that LV, after leaving Hogwarts, travels the world and
gets steeped in the Dark Arts. (That part is canon). In the process,
he comes across various prophecies written by Salazar Slytherin. They
are full of anti-Muggle and Mudblood remarks and also foretell that
there will be a Dark Lord (that LV recognizes as himself) who will be
challenged by a boy. (This would explain why LV would later pay
attention to a prophecy made by a fraud, SPT) If he kills the boy, he
will become immortal. 

So LV eventually starts his gaining of power, killing people,
etc.Eventually, SPT makes the prediction, and the 15 years of the
books that we know already play out. In the climax of the final book,
when Harry is 17, Harry and LV meet for a head on duel in the
Department of Mysteries, specifically in the Time Room. Harry somehow
utilizes love to partially disable LV, and then uses the first spell
that come to mind - Obliviate, which he has learned in the past year.
LV loses his memory, and wanders aimlessly around the room, eventually
landing in a sort of time machine that sends him back about a thousand
years. (We don't know exactly what everything in the Time Room is, and
there being a Time machine would be probable. The time turner cabinet
could possibly fill this role. Also, the whole "obliviate" deal is not
essential to this theory - only the fact that LV is sent back in time
is. How LV is sent back in time is not crucial. The memory charm idea
is just one of many possibilities.)

LV, in the past, gradually regains his memory - after all, Harry isn't
too good at it, and Lockhart did have some coming back. He is
recognized as a very strong wizard and becomes a part of the Hogwarts
Founding Four - Slytherin. As he regains his anti-Muggle beliefs he
fights the others more and more about who to let it, eventually
leading to him leaving the castle. What has now occurred is an
Ouroboros - a mythical snake in a circle that was perpetually eating
its tail. Eventually he regains everything and writes prophecies about
what happened in his past - others' future - to help his future self.
His theory is that if his future self can defeat Harry, he will break
the timeline that has occurred. After all, the prophecies had alrady
been written by the time LV was born, and nothing can change that. If
Harry was dead, the only one that could vanquish the Dark Lord is
gone, and LV would live forever.

So how does this fit in with Trelawney's prophecy?, you ask. For one,
"vanquish" means to destroy or defeat, there is no mention of killing.
By sending LV back to the past, Harry vanquished LV. However, there is
a part of the theory that mentions killing: "Either must die at the
other for neither can live while the other survives." Here, the word
"for" is used in a poetic kind of way, and it really kind of equates
and connects the two phrases, so that either they both are true or
neither are true. In other words, if "neither can live while the other
survives" - "they live at the same time" - is NOT true, than the first
part about one dying at the hand of the other is NOT necessarily true.
Furthermore, by banishing LV to another space-time sphere, Harry has
in effect killed LV because he ceases to exist in Harry's space-time
sphere. It is like how Sirius passes into another area when he goes
through the veil.

So, to sum up: LV is born, reads Slytherin's prophecies, and tries to
kill Harry. Harry sends him back in time where he becomes Slytherin.
In the past, Slytherin writes prophecies to help his future self.
(Note: these prophecies are not real prophecies like SPT's, but they
do have to come true.) Slytherin's theory is that LV could be able to
break the timeline and the prophecies and everything that LV needed
would still be there, as you can't change what has already occurred.

This theory also explains the whole ancestor/descendent
mistake/mystery-to-be-explained deal. While LV wouldn't be Slytherin's
ancestor, but rather Slytherin itself, DD got confused in everything
and just said that. Or, if that explanation doesn't suit you, LV went
back to the past and became Slytherin's father but still wrote the
prophecies. Either way, it explains the ancestor mystery. If it really
should say ancestor and not descendent, than this is the only theory
that makes sense that explains it. What does everyone think?