Health
12,600
Armour
70
Leadership
70
Speed
75
Melee attack
59
Melee defence
38
Weapon strength
275 base + 425 armour-piercing, +30 vs large
700
Charge bonus
42
Attributes

Causes Fear
This unit frightens all enemy units, reducing their leadership when nearby. It is also immune to fear. Fear penalties do not stack.

Causes Terror
This unit can cause terror, making its melee target rout for a short time. Units that cause terror are immune to terror and fear themselves.

Wallbreaker
Allows the unit to attack and destroy walls in melee. This attribute also adds a +50% damage multiplier against buildings.
Abilities
Abyssal CloakAugment · +20 Missile Block Chance, -4 LeadershippassiveAbyssal CloakAugment+20 Missile Block Chance-4 LeadershipPassive · Range 15 mThe very sight of a Merwyrm can provoke dread and hopelessness, its aura of crushing darkness even nullifying arrows and other missiles.
WoundsHex · -10% Speed, -20% Armour-Piercing Weapon Damage…passiveWoundsHex-10% Speed-20% Armour-Piercing Weapon Damage-20% Base Weapon DamagePassiveEven the greatest foes can be laid low with terrible injuries, and the greater the damage done, the less able they will be to effectively continue the fray.
RegenerationRegeneration · -20 Weakness to Fire Damage, Replenishes hit points of combatantspassiveRegenerationRegeneration-20 Weakness to Fire DamageReplenishes hit points of combatantsPassiveThere are beings and creatures that can mend bone and knit flesh at an incredible rate. A mighty boon, but one stunted by fire.
Who can field it
- Lothern
The game also has 1 summoned or scripted copy of this unit that players don't recruit directly (wh3_dlc27_hef_mon_merwyrm_summoned).
Where these numbers come from
Read from the game's database tables for patch 9.0 (main_units, land_units, battle_entities, melee_weapons, projectiles…) as published in the WH3-Dump export (commit 8a4f7e64). Formulas that turn table values into card values are checked against known units before they are shown — how we verify.