Amphibious. The dragon can breathe air and water.

Constructed Nature. The dragon doesn’t require air, food, drink, or sleep.

False Appearance. While the dragon remains motionless, it is indistinguishable from an inanimate bronze statue.

Faultless Tracker. The creature(s) that caused the dragon to animate becomes its quarry. The dragon knows the direction and distance to its quarry as long the quarry remains within Drakkenheim or until the dragon is destroyed.

Immutable Form. The dragon is immune to any spell or effect that would alter its form.

Magic Resistance. The dragon has advantage on saving throws against spells and other magical effects.

Magic Weapons. The dragon’s weapon attacks are magical.

Rejuvenation. If the tower dragon is destroyed, it regains all its hit points in 1 hour unless a disintegrate spell is cast on its remains.

Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Repulsion Breath.

Rend. Melee Attack Roll: +8, reach 10 ft. Hit: 16 (2d10 + 5) Slashing damage.

Lightning Breath (Recharge 5–6). Dexterity Saving Throw: DC 15, each creature in a 60-foot-long, 5-foot-wide Line. Failure: 49 (9d10) Lightning damage. Success: Half damage.

Repulsion Breath. Strength Saving Throw: DC 15, each creature in a 30-foot Cone. Failure: The target is pushed up to 40 feet straight away from the dragon and has the Prone condition.