need help finding a shaman bl

So in this one main character is not exactly a Shaman yea he also has like blue eyes , but his grandfather was like this famous Shaman and it's something related to like the past life between like him and the main lead. I think in the past life, the main lead was a goblin or something and the main character was his teacher or something that abandoned him, and then in the modern life, right, the main character goes to meet the male lead and see him wearing a goblin mask near a peach tree and the first time they meet like the male lead tries to hurt the character, but he gets hurt himself, and then they basically go on this like keep going around cause like the main lead keeps acting crazy sometimes, and they run into this guhimo and stuff and ppl get possessed too and the main character has this old korean style lamp with some spirits in them which helps guide the dead