Question: how to get the fourth dwarf scroll in stardew valley?
Answer: The Dwarf Scroll IV is an Artifact that can be found as a drop from any monster (other than the Wilderness Golem, Serpent, Skeleton, Carbon Ghost, Iridium Bat, Iridium Crab, and Haunted Skull), or by using the hoe on dirt in The Mines (floor 80+).