Multiattack. The dragon makes two Rend attacks.
Rend. Melee Attack Roll: +6, reach 5 ft. Hit: 9 (1d10 + 4) Piercing damage.
Cold Breath (Recharge 5–6). Constitution Saving Throw: DC 13, each creature in a 15-foot Cone. Failure: 18 (4d8) Cold damage. Success: Half damage.
Paralyzing Breath. Constitution Saving Throw: DC 13, each creature in a 15-foot Cone. First Failure: The target has the Incapacitated condition until the end of its next turn, when it repeats the save. Second Failure: The target has the Paralyzed condition, and it repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically.