Sources
CR
Type
Size
Alignment
Movement

Clockwork Stone Defender

Medium Construct, Unaligned

Armor Class 16 (natural armor)
Hit Points 105 (14d8 + 42)
Speed 30 ft.
STR
19
+4
DEX
10
+0
CON
17
+3
INT
3
-4
WIS
10
+0
CHA
1
-5
Damage Immunities poison
Condition Immunities Charmed, Exhaustion, Frightened, Paralyzed, Petrified, Poisoned
Senses darkvision 60 ft., passive Perception 10
Languages understands one language of its creator but can't speak
Challenge 4 (1,100 XP)

Traits

Magic Resistance. The clockwork has advantage on saving throws against spells and other magical effects.

Unusual Nature. The clockwork doesn't require air, food, drink, or sleep.

Actions

Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit:11 (2d6 + 4) bludgeoning damage, and if the target is Large or smaller, it is knocked prone.

Reactions

Intercept Attack. In response to another creature within 5 feet of it being hit by an attack roll, the clockwork gives that creature a +5 bonus to its AC against that attack, potentially causing a miss. To use this ability, the clockwork must be able to see the creature and the attacker.

Lore

Gnomes' tinkering with magic and mechanical devices has produced many failed Constructs but also has resulted in genuine advances, such as clockworks. The methods used to craft clockworks have been shared between gnome communities over many generations.