Sources
CR
Type
Size
Alignment
Movement

Steel Defender

Medium Construct, Unaligned

Armor Class 15 (natural armor)
Hit Points
Speed 40 ft.
STR
14
+2
DEX
12
+1
CON
14
+2
INT
4
-3
WIS
10
+0
CHA
6
-2
Saving Throws DEX +1 plus PB, CON +2 plus PB
Skills Athletics +2 plus PB, Perception +0 plus PB × 2
Damage Immunities poison
Condition Immunities Charmed, Exhaustion, Poisoned
Senses darkvision 60 ft.
Languages understands the languages you speak
Challenge

Traits

Vigilant. The defender can't be surprised.

Actions

Force-Empowered Rend. Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target you can see. Hit:1d8 + PB force damage.

Repair (3/Day). The magical mechanisms inside the defender restore 2d8 + PB hit points to itself or to one construct or object within 5 feet of it.

Reactions

Deflect Attack. The defender imposes disadvantage on the attack roll of one creature it can see that is within 5 feet of it, provided the attack roll is against a creature other than the defender.