Hi Massm, thank you so much for playing! And thank you for your question. Every Test is rolling a combination of your Soul (d6) and Skill (d4 or higher), taking the higher result. So roll both dice, then roll 2d8 for the World. You can use whichever stat you feel is most appropriate for the moment in your story- maybe you’ve just fought a ravenous beast, so roll Endure, or find yourself lost and Roll Search. Personally I’d probably roll my highest stat, as your character plays to their strengths to try to resolve the situation.