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A syringe with a green substance inside.
Isaac appears aggressive and angry.
Although the pickup quote claims that the item increases both speed and range, the item only increases Speed by 0.6.
- Flight - Being able to fly will allow much easier control of Isaac due to his high speed.
- This item's name, appearence and effect are taken from an item from The C Word, another of Edmund McMillen's games.
- Roid Rage is a term for aggressive behavior caused by the abuse of steroids.