Kingdom of Knuffel

poisonous sting

You can come back from life.

lovely kiss

You can make people fall in love with you with just a move of your hair.

you kill plants when you touch them

You can talk to swans.

You can curse people by turning their heart to ice, but you can only do it if they have deeply wronged someone and made no move of recompense/restitution for a year following their deed.
And to go along with the curse, you can always tell when someone has a wrong on their conscience, and when they have redeemed themselves.

You can tame 100 snakes at the same time.

she can change her hair color and features at will (like tonks)

You're like a willow-the-wisp: You can lure people off of their intended routes just by catching their attention and drawing them after you.