mentat

Mentat is a mushroom power class conferred by a strain of mushroom cultivated by imperial mycologists in the Lion Lands which emits a white, oscillating glow from the stalk of the fruiting body.

Mentats possess extraordinary powers of raw computation for trajectories.

So basically they shoot arrows, crossbows, cannons and other projectile-launching devices accurately.

Also they excel in billiards. The mere possibility that a player was a mentat and concealing this fact tanked the popularity of billiards gambling in the south of the continent.