BiPolar Intellect

Charges: once per long rest
Duration: one ability check

Ability score increase/decrease: -1 Int, +2 Str

Description: Outside of combat, once per long rest, you may choose to make your base intelligence or Wisdom score 20 for one ability check. You return to your natural state of stupidity thereafter.

The sphinx was perplexed when the only being to correctly answer their riddle was the Goliath, who's brain never held much more than thoughts of ale and battle.