Shandalar is an incredibly powerful human mage who lives in a skyship just east of Ulgoth's Beard.
When the player first visits Ulgoth's Beard, they will almost instantly be hailed by Shandalar. He will ask you to retrieve his cloak from a magical ice prison. You can agree, in which you will immediately be teleported to Ice Island with a wardstone that will take you back once you have the cloak. If you killed Shandalar's daughters in the Estate of Oberon you will be sent without choice. When you have returned from the island you can give him his cloak back and you will receive 500 xp.