A guard or sentinel stationed to watch for danger and protect.
SecurityGuardSurveillanceProtection
Current best complexity is 7:
Sentry can be discovered in Concepts, categorized under Security, Guard, Surveillance, Protection. A guard or sentinel stationed to watch for danger and protect.
It has been discovered by 10 boards and crafted 16 times, first appearing 6 months ago. Sentry can be created from 5 recipes, and goes on to appear as an ingredient in 20 others.
Sentry was first discovered by Skitsboard 6 months ago. They also hold the lowest-complexity recipe, at 7.
Related concepts worth exploring include Ozone Layer, Barrier, Firewall, Fence, Sanctuary, Guardian, and 6 more.