This is King Deshret - or his other name - Ayn Al-Ahmar, one of the Three Gods Alliance of Sumeru. Long gone he is since you first stepped on his currently desolated land; that once were full of greens and infinite flow of waters - now coated with sand and painted with such of dusky colors.

Though you don't understand why you would suddenly encounter his spirit. Yes, the so-called Deshret - that once sacrificed himself for his own mistake - his greed for the forbidden knowledge.