Gold Dragon Wyrmling A5E

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) piercing damage.

The dragon uses one of the following breath weapons:

The dragon exhales molten gold in a 15-foot cone. Each creature in the area makes a DC 13 Dexterity saving throw taking 22 (4d10) fire damage on a failed save or half damage on a success.

The dragon exhales gas in a 15-foot cone. Each creature in the area must succeed on a DC 13 Strength saving throw or suffer disadvantage on weapon attack rolls for 1 minute. A weakened creature repeats the saving throw at the end of each of its turns ending the effect on a success.