5e SRD:Blue Dragon Wyrmling
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Blue Dragon Wyrmling
Medium dragon, lawful evil
Saving Throws Dex +2, Con +4, Wis +2, Cha +4
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 3) piercing damage plus 3 (1d6) lightning damage.
Lightning Breath (Recharge 5-6). The dragon exhales lightning in a 30-foot line that is 5 feet wide. Each creature in that line must make a DC 12 Dexterity saving throw, taking 22 (4d10) lightning damage on a failed save, or half as much damage on a successful one.
See 5e SRD:Dragons.