Legendary Resistance (3/day). If Felgolos fails a saving throw he may choose to succeed on that saving throw instead.

Reversion. Felgolos returns to his natural form, an adult bronze dragon.

Spellcasting. Felgolos is a 9th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 15, +6 to hit with spell attacks). Felgolos has the following sorcerer spells prepared:

Cantrips (at will): lightning lure, dancing lights, shocking grasp, thunderclap

1st level (4 slots): detect magic, mage armor, feather fall, shield

2nd level (3 slots): misty step, dragon's breath

3rd level (3 slots): counterspell, lightning bolt, haste

4th level (3 slots): storm sphere, greater invisibility

5th level (1 slot): control winds

Light Crossbow. Ranged Weapon Attack: +5 to hit, range 80/320 ft., one target. Hit: 6 (1d8 + 2) piercing damage.