Beefmaster

Plant Camouflage: The Beefmaster has advantage on Dexterity (Stealth) checks made in areas of dense vegetation 

Rage: The Beefmaster enters a rage when it falls below 75% health. This rage gives it resistance to Piercing and Slashing damage, and reduces its vulnerability to Bludgeoning damage to standard damage. It also gains advantage on any Strength checks or saving throws.

Reckless: When the Beefmaster falls below 50% health, it begins attacking recklessly. This gives it advantage on all attack rolls made by the Beefmaster, but gives advantages to all attack rolls made against it.

Multiattack: When Reckless, the Beefmaster can make either 2 Punch attacks, or 1 Punch and 1 Slam attack. 

Slam. Melee Weapon Attack: +6 to hit, reach 5ft., one target. Hit: 14 (3d6 + 4) bludgeoning damage.

Punch Melee Weapon Attack: +6 to hit, reach 5ft., one target. Hit: 16 (4d8 + 4) bludgeoning damage.