Moondust

Refined from plants, Moondust is a potent stimulant that brings a short lasting feeling of alertness and vigour that quickly fades. After fading the users will ‘crash’ and be far less agile as they were before hand as the powder calcifies in their muscles.

Frequent users of Moondust (often referred to as ‘Waners’) often become addicted and as such it’s production, use and sale is banned by most guilds.

Mechanics

Taking a pouch of Moondust acts in the same way as the Haste spell, however, once the effect ends, the user must make a DC 16 Constitution saving throw or they will become paralyzed. They can make the saving throw at the end of each of their turns.