Large Construct, Typically Lawful Neutral
AC 21 (adamantine plating + Harmonic Fortress)    Initiative +7 (17)
HP 315 (30d10 + 150)
Speed 40 ft., Climb 20 ft.
Mod Save
STR 26 +8 +14
DEX 14 +2 +8
CON 20 +5 +11
Mod Save
INT 14 +2 +2
WIS 16 +3 +9
CHA 10 +0 +0
Skills Intimidation +5, Perception +8
Resistances Extra damage caused by Sneak Attack and Critical Hits
Immunities Poison, Psychic; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Adamantine; Charmed, Exhaustion, Frightened, Paralyzed, Petrified, Poisoned
Senses Truesight 60 ft.; Passive Perception 18
Languages Modron, telepathic link to Mechanus units within 1 mile
CR 19 (XP 22,000, or 25,000 in lair; PB +6)
Traits

Fortress Stabilizers. The Warden has advantage on saving throws against being knocked prone or moved against its will.

Siege Engine of Law. The Warden deals double damage to objects and structures.

Target Priority Subroutines. When a creature within 120 ft. damages the Warden, it can immediately mark that creature. It has advantage on attack rolls against marked targets until the end of its next turn.

Marching Anchor. Allied constructs within 30 ft. have advantage on saving throws against being frightened or charmed.

Actions

Multiattack. The Warden makes three Annihilator Cannon attacks or two cannon attacks and one Crushing Strike.

Annihilator Cannon. Ranged Weapon Attack: +12 to hit, range 150/600 ft., one target. Hit: 33 (6d10) radiant damage.

Crushing Strike. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 31 (5d10 + 8) bludgeoning damage. If the target is a Large or smaller creature, it must succeed on a DC 21 Strength saving throw or be knocked prone and grappled (escape DC 21).

Harmonic Detonation (Recharge 5–6). The Warden emits a pulse of golden planar energy. Each creature of its choice in a 30-foot radius must make a DC 20 Constitution saving throw or take 54 (12d8) radiant damage and 22 (5d8) thunder damage, or half on a success. Chaotic creatures make this save with disadvantage.

Bonus Actions

Harmonic Fortress Shield. As a bonus action, the Warden can activate a 20-foot-radius shield dome with 150 hit points. While active, it gains +2 AC, advantage on Dexterity and Constitution saving throws, and resistance to all damage except force and psychic.

Legendary Actions

Legendary Actions (3 per round)

  • Reposition. The Warden moves up to half its speed without provoking opportunity attacks.

  • Suppressive Fire. The Warden makes one Annihilator Cannon attack against a marked target.

  • Shield Surge. The Harmonic Fortress Shield regains 50 hit points.

  • Overdrive Pulse (Costs 2 Actions). All chaotic creatures within 20 ft. must succeed on a DC 20 Wis save or be stunned until the end of their next turn

Description

Lore

Forged in the Iron Maw Foundries of Mechanus, the Type-S Annihilation Warden is one of the most feared war machines in the Mechanus Legions. Towering over standard roller wardens, this construct is engineered to crush resistance, overwhelm enemy fortifications, and neutralize powerful individual targets — especially chaotic entities.

Unlike the lighter droideka series, the Annihilation Warden is not simply a rolling gun platform. It is a walking fortress, with heavy stabilizing limbs, integrated arcane annihilator cannons, and an advanced multi-layer harmonic shield system capable of withstanding bombardments.

Its role in Mechanus warfare is simple: advance without stopping. Entire squads of Marchers and Roller Wardens march in its shadow as it cuts a blazing path of Law through chaos.

Lair and Lair Actions

Lair / Battlefield Actions

When fighting in Mechanus or near a Law Node, on initiative count 20:

  • Shield Network. All allied constructs within 60 ft. gain temporary hit points equal to 20.

  • Gearshock Wave. All chaotic creatures in a 60-foot radius must succeed on a DC 20 Constitution save or be pushed 30 ft. and take 27 (6d8) thunder damage.

  • March of Law. All Roller or Marcher units within 120 ft. can move up to their speed as a reaction.

Monster Tags: construct

Habitat: Planar (Mechanus)

Treasure:  Armaments

WilliamTaylor7652

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