Riddick has had a long life. He has fulfilled the prophecy and has leaded the Necromonger to their destiny. And now as Riddick approaches his next great adventure, he's soul is stolen by the Power That Be.

After forming a new body for Riddick, the Power That Be inform that him that they have a job for him and if he completes the job then when he dies the next time he will be allowed to pass on. But if he does not complete the job for them then the consequence will be unpleasant.

The job is rather simple, Riddick needs to kill the Slayer's White Knight, kill Xander Harris.

Of course the Power That Be have forgotten a number of important things like Xander is very hard to kill and that Riddick follows his own rules and not someone else.

So while the Power That Be plot the next course of action for after Xander's untimely death the higher Gods make beats on how long the Power That Be will live before Xander and Riddick come after them

Xander as the elder half brother of Harry Potter, who has had a comprehensive magical and mundane education, unbeknownst to anyone in Sunnydale barring Jesse McNally who was a First Generation Wizard.

Special Magical Talents = Shamanism, Runes, Warding, Combat Magic, Magical Craftsmanship & Enchantments, Wolf Animagus, Mind Shield, Rituals

Also has a large trust fund & a fully secure Manor house in Colorado Or Wyoming that no one has access to outside of himself.

At age 17 he graduates both from his Magical & Mundane schooling & is accepted as an Auror

When the Dursley family is killed, he gains full custody of his half brother.

Helps Harry, Remus & Sirius get a Full = Examination, Cleansing, Physical & Psychological Healing, Private Mundane & Magical Education Tutoring, Restraining Orders, Inventory & Investigation Of All Properties & Assets By Blood-Magic-Law(e.g. Lineage, Bequests, Gifts...etc),

Wizarding Britain ends up getting a comprehensive, detailed & systematic investigation in their government, education, economy, medical...etc

And when the Scooby Gang find out and try and interfere, they end up being fully investigated, cleansed, physically & psychological healed, educated on reality & trained/backed up properly in combat if they are not arrested themselves

Extras

Bill & Charlie Weasley transfers even further away from England,

Percy Weasley decides to become a ICW Lawyer instead of becoming British Ministry toady,

The Twins become R&D Scientists with a private Canadian company with their dream Joke shop as a side business,

Ron Weasley enventually becomes a Oceania Auror after his attitude is worked out of him,

> all of them have minimal contact with their overbearing banshee mother or doormat father & continually refuse to go back to England

Hermione is continuasly shown the error of her ways such as in daily-chan fanfiction,

None of the Hogwarts staff are allowed to get away scott free as they are not innocent bystanders

No Tonks/Remus relationship as she's too immature/naive for him

Both Xander & Harry get adopted into Black Family

Bunny

Summer after Acathla whilst Buffy is away and the others are distracted – Xander acts in his own and the innocent town citizens best interests as he doesn't like the actions and inactions of the gang so far

[Side Note: Could of lost a secret boyfriend as well as blood brother Jesse to night life = Vampires/Dirty Parts Selling Doctor]

= Finishes creating his own secret Digital Supernatural library by safely scanning Giles and the Town books

= Goes and gets a full legit medical, cleansing ritual and several warding Tattoos in LA

= Clears out all of the town Caches – either Sells, Trades, Keeps, Returns or Destroys [Weapons, Books, Artefacts, Valuables, Cursed Items, Odds-Ends]

= Invites the Strongest, Strictest and most Realistic American coven to take care of ALL of Sunnydale magic users &/or dabblers where they end up either Killed, Healed, Adopted or Magic Burnt Away {Tara, Amy, Jonathan, Michael, Andrew, Rack, Willow...etc}

= Sells human secrets with proof to various government agencies regarding the town and its citizens [Mayor Office, Schools, Hospitals, Police & Fire Departments, CPS....etc] after ensuring his own legal safety [Rocket Launcher Theft and anything else]

Results

Town = Audited, Reviewed, Cleased, Blessed, Rebuilt....etc every which way from Sunday

Citizens = Either Arrested, Killed, Fired, Warned, Witness Protection, Voluntarily Moves...etc

Supernatural Community = Being dealt with by Hunters/Vatican &/Or Van Hellsing teams due to being alerted by the coven

Just imagine Buffy reactions when she gets home

Willow = Possibly Bound[Soul Curse - Black Magic & bad Ethics] and Arrested[Bad Hacking]

Giles = Possibly out of the librarian job [Occult/Supernatural Library is not friendly kids reading and he's kinda anti-social]

Oz = Possibly Moved in with a Peaceful Rural Lycan Pack somewhere else getting some needed training maybe

Classmates = Retested and Resorted based on actual modern day Academic standards and not Sunnydale 50's standards

Supernatural Community = Could consider her a non-issue compared to the proactive Vatican/Van Hellsing teams

Xander = End up a Emancipated Minor or finding Real family [possibilities a member of SGC/A, Numb3rs, Supernatural, Charmed, Criminal Minds....etc]

Ok this is a pretty easy bunnie, first pick how old is Xander. Is he on his post-grad trip, after Sunnydaale fell in, returning from Africa or some other time. Then pick the universe he's in. CSI Miami, CSI New York, M7 or something else.

Then have them find Xander who is suffering from amnesia. They take an interest in Xander and trying to help him find out who he is but a problem arise as people (Order of Taraka) keep trying to kill him.

Figure Xander got amnesia from either a head injury, too much stress and the brain rebooted or Willow deciding that Xander should no longer help.

I can see Xander helping hunt down people in Miami or with M7 using his hyeana sense. Or see him with Gibbs, soldier meet soldier.

On Halloween, Xander loses a bet and has to dress as a Octopus-like costume. Instead of a Squid, he turns into an Ascended Ancient version of himself. While he is transforming into his costume, his costume needed extra Energy to finish the transformation, so it absorbs the "endless" Energy of the Hellmouth, and because it has links to all of the other Hellmouths around the World he ends up absorbing those too, making him a literal Ascended Hellmouth.

Requirements:
-Because Xander tranformed into an Ascended on his own(the way he subconsiously absorbed the Hellmouth energies to complete the transformation under his own power, even if did do it unconsiously/subconsiously), the Ascended Ancients/Alterans can't get involved with him, I mean they can get involved with him but not in the "You can't use your powers in the lower planes to help(etc...)" and their whole "non-interference" policy, because he wasn't technically Ascended by them. Basically, he can start his own Ascended Group, with it's own rules and regulations.

-There -have- to be real Gods and Goddesses, not just Ascended Ancients/Alterans pretending to be them, like the Ascended Ancient/Alteran Janus.

-The Powers that Be have to be fakes, they only want balance because it keeps them in charge. If there is only balance and neither good or evil can win, then they can still be in charge.

-When Xander gets Ascended because of the costume he gets the status of an Elder God

-When Xander interferes on the Hellmouth, it's only as a last result, otherwise he would be just as evil as the bad guys, what with not letting them get fulfullment for a job well done, or, Xander could have made a clone of himself and set it loose in Sunnydale that has his memories up until he transforms into his costume and he just alters their memories so that things contunie like they did in the series only with an occasional help here and there, while he's elsewhere in the Galaxy, getting things ready for the SGC.

-(A) Xander has to secretly go back in time to when they were setting up the constituion of the U.S. and have them make the SGC officially independent from the US Governent in his time, and its own unlimited funding, etc..., that he won't let anyone know about until when they(The N.I.D. through Kinsey) try to excert their "supposed" authority over SGC. And everything from Cheyanne(?) Mountain, all the way too the Antartica Outpost. Or, he can have the Founders of the U.S. make an independent section of the U.S. Government totally dedicated to Aliens, like England had the Watcher's Council there for Magic. George Washington could have even been an Ex-Watcher if you want him to be, and he could have even put it somewhere in the Decleration or Constition about a Slayer getting the highest clearence level possible, and diplimatic immunity.

-Because of the nature of the Hellmouth, Xanders power is literally endless, he gets the memories and knowledge of anyone and everyone who has ever been in contact with a Hellmouth, and when one is destroyed, he gets/absorbs that endless amount of energy

-For anyone who wants to put Dawn in, they have to have her an Ascended Key, even if she did unconsiously pick a Green Octopus costume that matchs the Green color of the Key.

-Xander and Dawn, -have- to have their own dimension/plane of existence/realm/etc..., that is protected from any and all threats, kinda like a safe haven like the Elders realm is/was in Charmed.

-Any number of crossovers you want.