Sources
CR
Type
Size
Alignment
Movement

Earth Elemental Myrmidon

Medium Elemental, Neutral

Armor Class 18 (plate)
Hit Points 127 (17d8 + 51)
Speed 30 ft.
STR
18
+4
DEX
10
+0
CON
17
+3
INT
8
-1
WIS
10
+0
CHA
10
+0
Damage Resistances bludgeoning, piercing, slashing, from nonmagical attacks
Damage Immunities poison
Condition Immunities Paralyzed, Petrified, Poisoned, Prone
Senses darkvision 60 ft., passive Perception 10
Languages Terran, one language of its creator's choice
Challenge 7 (2,900 XP)

Actions

Multiattack. The myrmidon makes two Maul attacks.

Maul. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit:11 (2d6 + 4) force damage.

Thunderous Strike (Recharge). The myrmidon makes one Maul attack. On a hit, the target takes an extra 22 (4d10) thunder damage, and the target must succeed on a DC 14 Strength saving throw or be knocked prone.

Lore

Elemental myrmidons are Elementals conjured and bound by magic into ritually created suits of plate armor. In this form, they possess no recollection of their former existence as free Elementals. They exist only to follow the commands of their creators.