Metal Construct. As a metal construct the Dwemer Sphere does not need to breathe, however it is incapable of swimming. Sphere. The Dwemer sphere has disadvantage on saving throws against being moved or pushed. It is incapable of jumping or climbing.
Inbuilt Blade. Melee Weapon Attack: +4 to hit, reach 5 ft, one target. Hit: 1d8+4 slashing damage. Inbuilt Crossbow. Ranged Weapon Attack: +5 to hit, range 30/120, one target. Hit: 1d6+3 piercing damage.
Retract. The Dwemer Sphere can retract into a perfectly round sphere using its bonus action. When in this shape it's has +3 to AC and +10 ft to its movement speed, however it cannot take attack actions. It can revert to its normal shape using a bonus action on its turn.