You are a humanoid. 

You can be either Medium or Small. 

Your walking speed is 30 ft. 

Your lineage has a tendency to frighten others. This presence grants you proficiency in the Intimidation skill. 

When you meet the gaze of another creature directly, you can use your action to force it to make a Constitution saving throw, (DC 8 + Proficiency Bonus + Constitution Modifier) if you aren’t incapacitated and can see the creature. If the saving throw fails by 5 or more, the creature is instantly petrified. Otherwise, a creature that fails the save begins to turn to stone and is restrained. The restrained creature must repeat the saving throw at the end of its next turn, becoming petrified on a failure or ending the effect on a success. The petrification lasts until the creature is freed by the greater restoration spell or other magic.

After using this ability, you must make a Constitution saving throw, (DC 8 + Proficiency Bonus + Constitution Modifier). On a failure, you take one level of exhaustion. At the final level of exhaustion, death, the half-medusa dies and turns to stone. This effect is permanent and can only be reversed by use of the True Resurrection spell or Wish spell. 

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.