When you make your first attack roll on your turn, you can decide to attack recklessly. Doing so gives you Advantage on attack rolls using Strength until the start of your next turn, but attack rolls against you have Advantage during that time.
Damage Resistance - You have Resistance to Bludgeoning, Piercing, and Slashing damage.
Rage Damage - When you make an attack using Strength—with either a weapon or an Unarmed Strike—and deal damage to the target, you gain a bonus to the damage that increases as you gain levels as a Barbarian, as shown in the Rage Damage column of the Barbarian Features table.
Strength Advantage. You have Advantage on Strength checks and Strength saving throws.
The target takes an extra 2d8 Radiant damage from the attack. The damage increases by 1d8 if the target is a Fiend or an Undead.
Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 1.