Marthulimual enters a battle frenzy, gaining the benefits of Rage and, if he chooses, the ability to make one additional melee weapon attack as a bonus action each turn. The frenzy ends after 1 minute, when he falls unconscious, or when he chooses to end it. Frenzy causes one level of exhaustion when the rage ends.

Marthulimual can enter a rage as a bonus action. While raging, he has advantage on Strength checks and Strength saving throws, a +2 bonus to melee weapon damage using Strength, and resistance to bludgeoning, piercing, and slashing damage. He can rage three times per long rest, and the rage lasts for up to 1 minute if he attacks or takes damage each round.

Marthulimual makes a melee weapon attack with advantage using Strength. Until his next turn, attack rolls against him have advantage.

Marthulimual makes a greataxe attack or handaxe attack. While raging, he adds +2 damage to melee weapon attacks using Strength.

Marthulimual can throw a handaxe as a ranged weapon attack using Strength.

While not wearing armor, Marthulimual's Armor Class equals 10 + his Dexterity modifier + his Constitution modifier. His tortle Natural Armor provides AC 17, which he uses instead. He can still benefit from a shield.

Marthulimual chooses the Path of the Berserker, gaining the Frenzy feature at 3rd level.

Marthulimual has advantage on Dexterity saving throws against effects he can see, such as traps and spells. He does not gain this benefit while blinded, deafened, or incapacitated.

Marthulimual can secure free passage on sailing ships for himself and his adventuring companions, provided he is a welcome addition to the crew. He knows the habits of sailors, ship captains, and dockside workers, and can usually find food and shelter aboard a vessel or near a harbor.