Draconic Fire Constructs

You summon three winged serpents of living fire. Each one has AC16, HP30, and a flying speed of 60ft. They act after your turn, may make one action:

• Bite: Melee Spell Attack. +8 to hit, 10ft, on target (Hit = 4d10 Fire Damage)
• Flame Breath (Recharge 5-6): 15ft cone, Dexterity Save. (Failure = 4d8 Fire Damage)
• Coil: One creature, Strength Save. (Failure = Restrained until it escapes)
• Death Burst: When destroyed, creatures within 10ft make a Dexterity Save. (Failure = 2d8 Fire Damage)