Arcane Powder

Derived from a rare blue mushroom, this powder is inhaled to produce a state of mild hallucination and heightened awareness. Many magic users favor arcane powder. As an action, you can inhale this substance. For the next minute, you experience a high that allows you to roll an additional d4 when making an ability check, attack roll, or saving throw using Intelligence. At the end of the high, you must succeed on a DC 14 Wisdom saving throw or experience a low that lasts 10 minutes, during which you must roll a d4 and subtract the result when making an ability check, attack roll, or saving throw using Intelligence. At the end of the low, you must make a DC 13 Constitution saving throw to resist addiction. 

Notes: Consumable, Cursed