telepathy- Shatter cant actually speak, and instead projects their voice Via magic. They sound like several people speaking in harmony, with one young male voice being slightly more prominent then the others
form change- due to pretty much being a mass construct of Souls and Magic, Shatter is able to alter their appearence. They usually stay as their Humanoid or Wyvern forms, but can take others if absolutely necessary
lightning magic- this is less magic and more of Shatter produces an obscene amount of energy due to their mass of souls, which they often off vent as electctristy. They typically pulse it over their wings to make them fly faster, but can uses it to attack or even communicate over vast distances by making tesla coil like sounds.
soul magic- magic that comes naturaly to Soul Hydras. He can sense souls, absorb energy from them, give energy to them, or take them into his hive mind like mass.
immortality- due to the nature of Soul Hydras, he can not die by natural means. Unless someone kills him usually very specific weapons, or uses rituals to force his souls to move on, he can not die. If he is 'killed' by any other means, his mass will simply reform somewhere else after a period of time.
Other things!- they do not need to eat, sleep, or drink. They can, and often do to try to retain some grip on mortality, but they dont need it. They can also technically teleport, as they can travel between the realms of the dead and living. They dont tho, because the one time they did that they saw Ebony's birth parents and scared them
Also Shatter can actually technically commit suicide on command, as Ebony is the main soul in the mass and if he moves on the rest will go with him. However at this moment in time he doesnt feel like he deserves that
Yo fun fact in one of my original ideas for my Legends of Calian stories, Shatter trys to adopt Captain. However sense Shatter can sense souls, they Sensed Vale inside of Captain and became afraid of the possesed skeleton