A mild concussion may cause some dizziness, headache and disorientation. A severe concussion may also cause nausea, vomiting,
sleep disturbances, intolerance to light and noise and poor attention and ability to concentrate.

You suffer the following effects to all d20 rolls for the next 1d10 days.

Severity Imparment Penalty
Superficial -1
Minor -2
Major -4
Serious -6
Mortal Incapacitated
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