Graveyard Dragon

Elemental Aura. At the start of each of the graveyard dragon's turns, each creature within 5 feet of it takes 4 (1d8) damage of the type dealt by the dragon's breath weapon.

Elemental Resistance. The graveyard dragon has resistance to the type of damage dealt by its breath weapon.

False Appearance. While the graveyard dragon remains motionless, it is indistinguishable from a pile of dragon bones.

Reassemble Bones. As a bonus action, the graveyard dragon can rearrange its bone structure to fit into a space as narrow as 1 foot wide without squeezing. It can use a bonus action to reassemble itself into its normal form. While in this compressed form, it can't make melee weapon attacks.

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

Bite. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 14 (2d10 + 3) piercing damage plus 4 (1d8) damage of the type dealt by the dragon's breath weapon.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.

Breath Weapon (Recharge 5-6). The dragon releases a breath weapon that corresponds to the type of dragon it was in life. Each creature in the area must make a DC 14 Dexterity saving throw, taking 40 (9d8) damage of the corresponding type on a failed save, or half as much damage on a successful one. * Black. Acid damage in a 30-foot line that is 5 feet wide. * Blue. Lightning damage in a 30-foot line that is 5 feet wide. * Green. Poison damage in a 30-foot cone. * Red. Fire damage in a 30-foot cone. * White. Cold damage in a 30-foot cone.