They can curse others to only speak in rhyming couplets that can take days or even weeks to wear off (depending on strength and number of people in the spell), the longer it lasts the more energy it drains
They can curse others to sing everything, that can take days or even weeks to wear off (depending on strength and number of people in the spell), the longer it lasts the more energy it drains
They have a minor ability to inspire the musical talents in those around them
Their music can calm those around them for a short time
As they are nymphs they do not age, remaining eternally young.
They have a telepathic/empathetic connection with nature and other nymphs
They can sustain a high pitch with their voice, that is so loud it will temporarily stun anyone around them, its effects are temporary and it effects everyone around them, friend or foe. They can also do this with a musical instrument as well.
They can infuse magic into their song and ‘charm-sing’ another into doing their will or revealing a secret to them; the person will remain under the control of the charm-sing for a few minutes or until control is relinquished
They have such a beautiful voice, that when they sing, people can't help but listen, this can often distract enemies while in battle
They can play any musical instrument, even if they have never seen it before