Sometimes a D20 Test is modified by Advantage or Disadvantage. Advantage reflects the positive circumstances surrounding a d20 roll, while Disadvantage reflects negative circumstances. You usually acquire Advantage or Disadvantage through the use of special abilities and actions. The

HEroic inspiration Sometimes the GM or a rule gives you Heroic Inspiration. If you have Heroic Inspiration, you can expend it to reroll any die immediately after rolling it, and you must use the new roll. Only One at a Time. You can never have more than one instance of Heroic Inspiration. If something gives you Heroic Inspiration and you already have it, you can give it to a player character in your group who lacks it. Gaining Heroic Inspiration. Your GM can give you Heroic Inspiration for a variety of reasons. Typically, GMs award it when you do something particularly heroic, in character, or entertaining. It’s a reward for making the game more fun for everyone playing. Other rules might allow your character to gain Heroic Inspiration independent of the GM’s decision. For example, Human characters start each day with Heroic Inspiration. GM can also decide that circumstances grant Advantage or impose Disadvantage.