Giant, Thursir Armorer 2014
CR 6 giant
Large giant, lawful evil
Thursir armorers wear armor forged from dwarven armor and shaped to resemble dwarven armor. Skilled blacksmiths can recognize and exploit this design quirk. When a creature proficient with smith’s tools scores a critical hit vs. thursir armorer armorer’s armor breaks reducing armorer’s AC by 5 until armorer repairs armor. If armorer is critically hit by any creature while its armor is broken armor shatters and is destroyed reducing armorer’s AC to 12.
Bonus Actions
Draws on the soul fragment trapped in one of the dwarven skulls on its belt. Armorer has advantage on ability checks when using smith's tools and on attack rolls using a battleaxe handaxe light hammer or warhammer until start of its next turn. It carries six skulls on its belt.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details