Autonomous Sentry (5e Trap)
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This trap resembles a small ballista in appearance. It consists of a large crossbow integrated into a mechanism that can aim and fire it at will at targets that come within its firing range. No particular checks are required to detect its presence. A creature can disarm it with a successful DC(16) Dexterity check using thieves' tools or tinker's tools.
The autonomous sentry is a construct with statistics listed below. It acts on an initiative score of 10 (losing ties), and on each of its turns uses its action to make a Crossbow Bolt attack against the nearest hostile creature within range that it can see.
The creator or owner of this trap can command the autonomous sentry to instead target a particular creature, object, or area within range with its Crossbow Bolt attack, designate certain creatures to not be targeted, or activate or deactivate the trap altogether.
Medium construct, unaligned
Armor Class 14 (natural armor)
Damage Resistances acid, lightning, necrotic
Sturdy. The autonomous sentry can't be pushed or moved from the space it occupies because it is anchored to the floor.
Resilient. The autonomous sentry has advantage on saving throws against spells.
Structural Nature. The autonomous sentry counts as a structure for the purposes of damage sources that deal double damage to structures.
Crossbow Bolt. Melee Weapon Attack: +2 to hit, reach 90 ft., one target. Hit: 7 (1d8 + 2) piercing damage.
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