The Fire Flock

You release your rage and anger in the form of a blazing flock of birds. Casting a fistful of feathers before you, each of the feathers bursts into flame, taking on the form of a flame hawk. The flock encircles you in a protective ring, granting you immunity to fire damage, and granting you an additional d6 on rolls to evade spell checks. As a bonus action, you can direct the fire flock to one of the following effects:

Ignite: The birds expand out to up to 10 targets within 50 ft around you, alighting on their weapons and armor. Each of these targets adds +10 fire damage to each of it's melee or ranged attacks, or may add an additional +15 to the effects of cast spells' damage. They additionally gain resistance to fire damage.

Blaze: The fire flock disbands from around you, spilling out in a 120 ft cone. Creatures within the cone must make a DC (Dex) save (18) or take 12d12 fire damage, and are lit on fire. Once the  flock reaches the end of it's cone, it disbands, and each of the birds dissolves to ash.

Engulf: The flock shifts its fiery circle from you to a target you can see within 120 ft. The target can be an object or creature up to large size. The target becomes immobilized in the fire ring of birds, being burned for 3d10 fire damage. It also has disadvantage on attacks or spells which would require line of sight, and is considered silenced. At the beginning of each of its turns, the target may attempt the DC save again at no cost with a fail resulting in an additional 1d10 fire damage and remaining immobilized. On a pass, the fiery birds turn to ash and disappear.

Immolate: The birds descend on a single target, binding themselves together in the visage of a single immense bird of flame.  Make a standard attack roll. On a miss, the birds disburse and return to you, on a hit, the target takes 20d20 fire damage and is knocked prone. If the creature is taken below 0 hit points by this effect, it is turned to ash and vaporized, with no remaining physical form, as the birds also turn to ash and disappear.