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# Cogsprocket Sentinel
Large construct unaligned
 
**Armour Class:** 17 (natural armor)<br>
**Hit Points:** 110 [roll:13d10 + 39]<br>
**Proficiency Bonus:** <br>
**Movement:** 40$\quad$ *Climb:* 40
 
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| **STR** | **DEX** | **CON** | **INT** | **WIS** | **CHA** |
|---------|---------|---------|---------|---------|---------|
| 18 (+4) | 18 (+4) | 16 (+3) | 6 (-2) | 10 (+0) | 5 (-3) |
 
---
 
**Saving Throws:** <br>
**Skills:** <br>
**Senses:** Blindsight 90 ft. (blind beyond this radius), passive Perception 10<br>
**Languages:** Understands the languages of its creator but can''t speak<br>
**Challenge:** 7 / (2,900XP)
 
**Damage Immunities:** Poison, Psychic<br>
**Condition Immunities:** Blinded, Charmed, Deafened, Frightened, Paralyzed, Petrified, Poisoned<br>
```
 
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![[plots/clockwork-tower/images/cogsprocket-sentinel.png]]
 
```

Special Abilities

Immutable Form.

The Cogsprocket Sentinel is immune to any spell or effect that would alter its form.

Swarm Tactics.

The Cogsprocket Sentinel has advantage on an attack roll against a creature if at least one of the sentinel’s allies is within 5 feet of the creature and the ally isn’t incapacitated.

Guardian Protocol.

If a creature deals damage to a Cogsprocket Spider within 60 feet of the sentinel, the sentinel can move up to half its speed toward that creature as a reaction.

Actions

Multiattack

The Cogsprocket Sentinel makes two slam attacks and one piercing strike.

Slam

Melee Weapon Attack: +8 to hit , reach 10 ft., one target.

Hit: 14 ) bludgeoning damage.

Piercing Strike

Melee Weapon Attack: +8 to hit , reach 5 ft., one target.

Hit: 18 piercing damage.

Repair Burst

The Cogsprocket Sentinel releases a burst of magical energy. Constructs within 20 feet of the sentinel, including itself, restore 15 hit points.

Description

Spider-like and towering above its smaller counterparts, the Cogsprocket Sentinel is a larger mechanical arachnid that is the chief guardian and overseer within the Artificer’s Library. Built with reinforced metals and imbued with advanced mechanisms, it is both a marvel of engineering and an imposing figure of defense. With an extended reach and enhanced functions, this guardian not only performs repairs but also acts as the frontline of protection against threats. Its central core emits a dim glow, signifying its heightened energy source. Its primary directive is the protection of the library and its denizens, making it a formidable foe for any would-be intruder. In its presence, the smaller Cogsprocket Spiders work with increased coordination, their combined efforts a testament to the Clockwork Tower’s genius engineering.

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Source: Penny Blood Adventures