Multiattack

The corrupted ogre can use its Chieftain's Command or Chieftain's Might. It then makes two Greatclub or Javelin attacks.

Greatclub

Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage plus 9 (2d8) force damage.

Javelin

Melee or Ranged Weapon Attack: +9 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 13 (2d6 + 6) piercing damage plus 9 (2d8) force damage.

Chieftain's Command

The corrupted chieftain barks an order to one Giant it can see within 30 feet of it, sharing a measure of its power with the target. The target has advantage on the next attack roll it makes before the start of the chieftain's next turn. In addition, the next attack roll against the target before the start of the chieftain's next turn has disadvantage.

Chieftain's Might

The corrupted chieftain causes its eyes to glow, its muscles to swell, and the ground beneath its feet to rumble. Each creature within 15 feet of the chieftain must succeed on a DC 15 Wisdom saving throw or be frightened until the end of its next turn.