How do I obtain and upgrade a skill? Agent #2 October 12, 2018 20:58 Follow You can obtain or upgrade a skill by reading a skill book. Search for skill books wherever you might go in Grim Soul. Related articles What is the Altar and what is it used for? What is Castle Level? What are Soul Shards for and where are they found? How do I charge an active skill? What is a “Passive Skill”? Comments 0 comments Article is closed for comments.