Aethersteel Ankheg

Armor Class 19 (natural armor), 13 while prone.

Hit Points 97 (13d10 + 26)

Speed 30 ft., Burrow 10 ft.

STR

19 (+4)

DEX

11 (+0)

CON

15 (+2)

INT

2 (-4)

WIS

13 (+1)

CHA

6 (-2)

Saving Throws STR +7, CON +5

Damage Vulnerabilities Necrotic

Damage Resistances Slashing from Nonmagical Attacks, Piercing from nonmagical attacks, Acid, Bludgeoning from non magical attacks

Senses 60 ft., 60 ft., Passive Perception 14

Languages --

Challenge 5 (1,800 XP)

Proficiency Bonus +3

Traits

Magic Resistance: The aethersteel-infused ankheg has advantage on saving throws against spells and other magical effects.

Aethersteel Aura: The ankheg emits a faint, magical aura. Creatures within 10 feet of the ankheg have disadvantage on saving throws against the ankheg's Acid Spray.

Actions

Multiattack: The ankheg makes two attacks: one with its bite and one with its tail.

Bite:

Melee Weapon Attack: +7 to hit, reach 5 ft., one target.
Hit: 15 (2d8 + 6) piercing damage plus 7 (2d6) acid damage.

Tail:

Melee Weapon Attack: +7 to hit, reach 10 ft., one target.
Hit: 12 (2d6 + 4) bludgeoning damage.

Acid Spray (Recharge 6):

The ankheg spits acid in a line that is 30 feet long and 5 feet wide. Each creature in that line must make a DC 15 Dexterity saving throw, taking 21 (6d6) acid damage on a failed save, or half as much damage on a successful one. Creatures within the Aethersteel Aura have disadvantage on this saving throw.

Reactions

Defensive Burst: When the aethersteel-infused ankheg takes damage, it can use its reaction to release a burst of magical energy. Each creature within 5 feet of the ankheg must make a DC 15 Constitution saving throw, taking 10 (3d6) force damage on a failed save, or half as much damage on a successful one.

Legendary Actions

The AetherSteel Ankheg can take 1 legendary action, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The Ankheg regains spent legendary actions at the start of its turn.

Aether Pulse: The Ankheg emits a pulse of AetherSteel energy. Each creature within 10 feet of the Ankheg must make a DC 15 Dexterity saving throw, taking 7 (2d6) force damage on a failed save, or half as much damage on a successful one.

Burrow: The Ankheg moves up to half its burrow speed without provoking opportunity attacks.

Description

This ankheg has been naturally suffused with AetherSteel, a rare and potent metal. The infusion of this material has enhanced the ankheg's physical and magical capabilities, making it a formidable opponent.

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