Degiik

The degiik is a tree that grows in mountainous regions and has black and white colored leaves. It is, however, its bark that is sought after for its brain-activating effects in humanoid creatures. The preparation has no effect on animals or other creatures.
The degiik decoction grants a +1 bonus to proficiency bonus on all Intelligence, Wisdom and Charisma checks for a duration of 1 minute. This does not work for attack rolls and saving throws.