Many, many things. Wet things and dry things. Things from plants, things from animals, things from stone and sky and tree and man and mer. So many beautiful things for potions. All of them there for the taking, waiting to be plucked and put to use. "Grind me! Take my essence and turn me into something new, something wonderful!" they cry out to me. For Magicka (and without Magicka where would I stand now?) the ichor of an Elytra can be mixed with Withering Moon by a Novice or Thorn Hook by a Journeyman. No explorer in the Shivering Isles should venture forth without looking for these.