All player characters have 5 major Resources: Vitality, Stamina, Skills, Character Points, and Downtime.
Stamina is what powers a character's abilities. A character who wishes to use a skill must expend effort and energy to accomplish a task; this effort is represented by Stamina points. When you decide to use a skill or spell, or attack, that skill description tells you how much Stamina it costs to fuel that ability. If you don't have enough Stamina left, you can't use a skill or ability.
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