Aeglos

Infusion (ingested), requires herbalism kit
Description: A tall, thorny plant with white, sweet-smelling flower; the roots are used as a stimulant.
Crafting: 10 minutes, DC 20 Intelligence check, expires after 1 week
Effect: When a creature drinks the infusion, at the beginning of their next turn they gain a +1 bonus to Armor Class if they are wearing no armor or light armor, which lasts for 10 rounds. This herb has no effect when used again on the creature until the creature completes a short rest.