Ancestor Spirit body won't glow

Yo, I've been working on cleaning up my achievements and I saw that I haven't killed the Ancestor Spirit. I have killed the REGAL Ancestor Spirit, though.

So I went down to Siofra River, ran around and lit 8 obelisks, saw the little pop-up when I lit the eighth one, and when I went to look foor a body, I found a deer carcass but it wasn't glowing. I headed up north and I found one that was glowing,a and I was like "oh finally" but that was just the Regal one's corpse; the arena was empty.

EDIT: Nvm found it lol

Where exactly is the body for the regular Ancestor Spirit fight?