You are temporarily incapacitated.
If you are suffering from 2 or more levels of Stunned, you cannot use your Reaction until the end of your next turn.
At the start of your next turn, you do not gain the following actions based on the number of levels of Stunned you are suffering from:
At the end of your turn, you lose up to 4 levels of Stunned.
Levels of Stunned inflicted by different afflictions can stack.
If you are suffering from the Slowed bane, treat each level of Slowed as if it were a level of Stunned when calculating how many actions you lose at the start of your turn, and subtract your level of Slowed from the levels of Stunned you lose at the end of your turn. (Effectively, Slowed is a more long-lasting version of Stunned, which doesn’t fall off at the end of your turn.)