Ogre Howdah

The ogre carries a compact fort on its back. Up to four Small creatures can ride in the fort without squeezing. To make a melee attack against a target within 5 feet of the ogre, they must use spears or weapons with reach. Creatures in the fort have three-quarters cover against attacks and effects from outside it. If the ogre dies, creatures in the fort are placed in unoccupied spaces within 5 feet of the ogre.

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) bludgeoning damage.