Duergar Resilience. Wulfgar has advantage on saving throws against poison, spells, and illusions, as well as to resist being charmed or paralyzed.

Rage of the Giants (Recharges after a Short or Long Rest). For 1 minute, Wulfgar magically increases in size, along with anything he is wearing or carrying. While enlarged, Wulfgar is Large, doubles its damage dice on Strength-based weapon attacks (included in the attacks), and makes Strength checks and Strength saving throws with advantage. If Wulfgar lacks the room to become Large, it attains the maximum size possible in the space available.

While enlarged in this way, Wulfgar gains the benefit of a barbarian rage, taking half damage from bludgeoning, slashing and piercing attacks, as well as gaining +2 to his damage rolls.

Silvered War Pick. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 5) piercing damage, or 12 (2d8 + 7) piercing damage while enlarged.

Javelin. Melee or Ranged Weapon Attack: +7 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 5 (1d6 + 5) piercing damage, or 9 (2d6 + 7) piercing damage while enlarged.

Invisibility (Recharges after a Short or Long Rest). Wulfgar magically turns invisible until it attacks, casts a spell, or uses its Enlarge, or until its concentration is broken, up to 1 hour (as if concentrating on a spell). Any equipment Wulfgar wears or carries is invisible with it.