In Elbaf, there exists an ancient building that is 3 millennia old.
From the dating, as well as the Harley, it seems likely the building is from the first world.
As well know, the first world was destroyed by the god of earth and the serpent of flames.
Given Loki’s snakelike eyes and the fact he’s said to be able to destroy the world, I think it’s possible he has the hellfire snake DF.
I think the building, being from a world destroyed by the snake, could contain some sort of counter to the snake in order to prevent the snake from destroying the world in the future. Perhaps a clone of the hellfire snake fruit or another fruit entirely that counters that of the snake.
Oda likes to reuse ideas. Momo had a copy of Kaido’s fruit and they had a brief face off in wano before Luffy beat him.
Given Loki’s affinity for Rocks and his hatred of Shanks, I think him allying with Teach is inevitable. When that ultimately happens I think Oda might reuse the idea he did with Momo on Hajrudin.
Basically having Haj get the clone of the snake fruit and face off against Loki in the final war, holding his own, before inevitably losing and getting swapped out with a stronger fighter.

From the dating, as well as the Harley, it seems likely the building is from the first world.
As well know, the first world was destroyed by the god of earth and the serpent of flames.
Given Loki’s snakelike eyes and the fact he’s said to be able to destroy the world, I think it’s possible he has the hellfire snake DF.
I think the building, being from a world destroyed by the snake, could contain some sort of counter to the snake in order to prevent the snake from destroying the world in the future. Perhaps a clone of the hellfire snake fruit or another fruit entirely that counters that of the snake.
Oda likes to reuse ideas. Momo had a copy of Kaido’s fruit and they had a brief face off in wano before Luffy beat him.
Given Loki’s affinity for Rocks and his hatred of Shanks, I think him allying with Teach is inevitable. When that ultimately happens I think Oda might reuse the idea he did with Momo on Hajrudin.
Basically having Haj get the clone of the snake fruit and face off against Loki in the final war, holding his own, before inevitably losing and getting swapped out with a stronger fighter.