Mandrake

Mandrakes, or Mandragora, are magical plants (resembling crying babies, initially) which have incredible, restorative powers. Used in the creation of Restorative Draughts which cures Petrification, they are only effective in their mature form. As Mandrakes grow older, they become 'teenagers' and exhibit human behaviours, such as throwing parties, but be warned: as they mature, their cries become fatal. So, as long as someone is wearing earmuffs when working with Mandrakes, they're really, rather useful.