Amphibious, the dragon can breathe air and water. 

sweetened, this creature has the sweetened condition, this creature has one attack that can spread the sweetened disease, if the target struck by this disease has three days before turning into a sweetened creature. a sweetened creature is no longer its own being and is now serving to protect the source of the curse. if the target has not been fully consumed by the disease it can be cured by killing the source or by a remove curse spell. if fully consumed it can only be healed by a wish spell or by killing the source. 

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

bite , Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: (3d10 + 4) piercing damage. 

claw, Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: (2d6 + 4) slashing damage.

sweetened breath (recharge3-5),the dragon exhales contiminated whipped cream in a 30-foot cone. Each creature in that area must make a DC 14 Constitution saving throw, if failed gets the target is struken with the sweetened disease. the area the cream reached is now difficult terrain.