Reckless. At the start of its turn, the berserker fanatic can gain advantage on all melee weapon attack rolls during that turn, but attack rolls against it have advantage until the start of its next turn.

Unarmored Defense. The berserker fanatic adds it’s constitution and dexterity bonuses together when determining its AC as long as the berserker fanatic is not wearing armor.

Greataxe. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (1d12 + 3) slashing damage or 11 (1d12 + 5) slashing damage while raging.

Rage. The berserker fanatic flies into a feral rage lasting for 1 minute, the rage ends early if the berserker fanatic falls unconscious; the rage also ends early if the berserker fanatic hasn’t attacked a creature since its last turn, or hasn’t taken any damage since then. While raging, the berserker fanatic gains the following:

• The berserker fanatic has advantage on Strength checks and Strength saving throws.
• Whenever the berserker fanatic makes a melee weapon attack using Strength, it gains a +2 bonus to the weapons damage roll (included in attack).
• The berserker fanatic has resistance to bludgeoning, piercing, and slashing damage.