Keen Hearing and Sight. The orc has advantage on Wisdom (Perception) checks that rely on hearing or sight.   Relentless Endurance (1/day). When the orc is reduced to 0 hit points but not killed outright, it can drop to 1 hit point instead.   Savage Attacks. When the orc scores a critical hit with a melee weapon attack, it can roll one of the weapon’s damage dice one additional time and add it to the extra damage of the critical hit.