Secret Layla message ? (minor spoiler)

[Kobal2 [Déchus]]

After some time playing as Bayek, Layla experiences the Bleeding Effect and can start climbing around her cave. Up on a ledge in the large cavern there's an egyptian tablet left by Bayek that says something like "East of the oasis I call home I found a very powerful artifact. It's in a cave in the cliffside that's hard to see and can only be reached by a fork in the road. Maybe I'll bring it back someday" (from memory, but it should be close). Any idea what that refers to ? I tried looking with Bayek, but so far no dice...

[kimnicaro]

I've been up and down all the cliffs I could find east of Siwa and searching around the roads (both on horseback and with Senu) for about three hours now. Didn't find anything yet either, but I'd think it's weird if there's nothing that message refers to.

[kimnicaro]

Update (in case you're still interested), I thought it might refer to the cave Layla is in, where Bayek is buried. Found it in the Animus, but apart from a few hyenas and some random loot (purple, but nothing special otherwise), I couldn't find anything there. The cave does match the description in the message, but I wouldn't describe anything there as a "powerful artifact", so I'm not sure if that's it.

[Kobal2 [Déchus]]

Yeah I'd found it too :) (and later, coming out into the sun Layla commented "hey, I've been here as Bayek !") but I doubt it's the "right" one. I found one achievement guide saying "there's one location that doesn't have a "?" east of Siwa and some 350 meters from the border between the Siwa province and the next one over (Saqqara depression IIRC) which seems like it would fit the bill, however even with this narrowing down I still haven't managed to stumble upon it.

[Kickass Anime]

I found it to it's called Hotep's Cavern in the Qattara Depression

http://steamcommunity.com/profiles/76561197970866245/home/

[Kobal2 [Déchus]]

Yup, turns out I had already found it ages ago, but since once you find it it has a "?", I figured "nope, gotta be another one" :).
Can't remember finding any Epic Lewt in there though.

[IronsteffL]

I think I have the answer - even though I hope I'm wrong and there IS something obtainable out there. Well, I actually think there is - but maybe in a sequel.

If you visit the cave with Bayek, the part where the Animus and the sarcophagi are is blocked of by - strangely - artificial/crafted stone blocks. Someone was there, maybe in the old kingdom or, like in many other grave sites in AC Egypt, even earlier. Isu-early.

My theory: Bayek wanted to return anyway, at least he implies that he thinks this would be a good resting place for him and Aya. Later in his life, he visited the caves again, maybe he lead an excavation (a good resting place needs proper research) and he stumbled over a Piece of Eden. This lead him to Aya to tell her about the discoveries he made, they grew closer again until finally, Bayek did return to the Hotep cave: to be buried there.

Tl;dr - Bayek means Hotep cave, but we won't find the artifact yet, because it is in the blocked off part of the caves Bayek has yet to find a way into. And after searching the cave for hours (as many others did; it's not THAT large), I highly doubt the way to do that is in Origins.