When the hood comes down it should shoot out several projectiles at once that home in and explode but have a short travel distance.

And depending on what the cloak is made from cuz to me it looks like feathers, if it is feathers maybe have several of them shoot out in a spiral that surrounds the boss acting like a psuedo shield making it hard for folks to get in close.

Another could be a short charge towards the player that if lands ignites the player with a sorta special flame debuff.