Building Block Dragon

Made Of Blocks: Whenever the dragon suffers 10 or more points of damage, part of it's body breaks off and loses an attack or ability. Roll a d6 to determine what part breaks.

1: Nothing significant breaks.

2: Arm: Cannot use it's claw attack.

3: Left Wing: Can no longer sustain flight and must land on it's next turn. Cannot use it's wing attack either. If both wings are broken before it can land, it plummets to the ground and suffers the consequent falling damage.

4: Right Wing: Can no longer sustain flight and must land on it's next turn. Cannot use it's wing attack either. If both wings are broken before it can land, it plummets to the ground and suffers the consequent falling damage.

5: Upper Jaw: Can no longer use it's bite attack.

6: Lower Jaw: Can no longer use it's breath weapon.

Reconstruction: On the dragon's turn, it regains 10 hit points as it reassembles it's body. Roll a d6. If the number rolled corresponds to a body part that it's missing, regain use of that body part.

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage.

Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Fire Breath (Recharge 5–6). The dragon exhales fire in a 30-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 30 (10d6) fire damage on a failed save, or half as much damage on a successful one.

The dragon can take 2 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn.

Claw Attack:  The dragon can make a claw attack.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 16 Dexterity saving throw or take 13 (2d6 + 6) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.