Lotus in the Nile(BillDip)

Dipper is an American training under his Uncle, Professor Ford, at Oxford. He has spent the last ten years of his life devotedly studying ancient cultures and their languages. He is an expert in reading and writing Egyptian, Greek, Latin, and Hittite.
And this year, he is finally getting to go on an excursion to Egypt.
Excited to finally see the ancient civilizations he has studied for so long, Dipper's first excursion to the pyramids is to a rather strange one which is unlike all the others. Instead of a tomb, this pyramid seems to be built more like a temple.
Things go haywire, however, when Dipper accidentally falls into another dimension where he happens to meet a rather strange pompous triangle who offers him a deal.
Escape, in return for a portion of Dipper's life: Just a single month.
The boy, with no other choice, agrees and is quickly teleported out of the temple with his new companion and his recently formed human body.
There's just one problem. Bill's awakening has garnered the attention of powerful men and women all over the world who would kill to get his powers. Now Dipper and Bill are on the run until the month is up. But as they dodge through impossible and dangerous situations Dipper finds himself falling for the chaos god... even as their time together is running out.