If you want to hatch a Wyvern Egg It's easy just place 2 Fireplace Left and 2 right and 1 in front Congrats you successfully Hatch Your egg Cuz Those who don't know You can't place more than 4-6 Torchess or Campfire at same place So yu can't hatch your egg it will say it's too cold

UP THIS Message for those who can't Hatch their eggs ;)