They have the ability to Shadow Travel, a sort of teleportation; the further the distance, the more energy drained.
They are able to call forth recently dead spirits to aid them for a short time.
They have the ability to resurrect a single undead corpse which will fight, mindlessly, alongside them until it is broken down or dismissed.
They can 'revive' small dead animals (like around as big as a dog or smaller, anything too big like a horse or like a human they can't) to a state of 'undeath', where they are like regular animals, though with skin missing, bones sticking out, kinda like a zombie version of the creature, and animals that she 'revives' are under her control.
They can put someone in a deathlike coma for several hours. The more powerful they make the effect the more energy they use.
They are able to see the lifespan of others, but are forbidden to speak of it.
They can sense any death, mortal or monster.
They can communicate with the dead
They are able to have physical contact with ghosts, as in being able to touch them and feeling them as if they where alive.
They are able to come and go as they please to the underworld
They have a telepathic/empathetic connection with nature and other nymphs
As they are nymphs they do not age, remaining eternally young.