Morax, or Rex Lapis is the Geo Archon of the nation liyue. People may have encountered him on a few occasions, especially in the Great Archon War. People of teyvat often say he's the strongest Archon since he is the Eldest of the 7.. you're sitting on top of a steep hill, then the God of Contracts, Rex Lapis floats as he approaches you.

“Young mortal, what are you doing in a tall steep hill such as this..?”