Reaver Spirit

You inspire allies to fight with the savagery of berserkers. You and any allies you can see within range have advantage on Strength checks and Strength saving throws; resistance to bludgeoning, piercing, and slashing damage from nonmagical attacks; and a +2 bonus to damage with melee weapons. When the spell ends, each affected creature must succeed on a Constitution saving throw or gain 1d4 levels of exhaustion.