Sweetspark Hexmallow

Marshmallow Magic This marshmallow has a wonderful honey-lemon flavor with a swirl of vanilla. Its surface is dusted with sparkling sugar crystals that twinkle in the light.
  You can use a bonus action to eat this marshmallow, when you do, you gain a bonus to all Investigation checks you make equal to your proficiency bonus until you finish a long rest. However, for the duration you also suffer a negative penalty to all Perception checks you make equal to your proficiency bonus. For the duration, you cannot gain the benefits of any other hexmallow.