Chapter 122: "'Taravangian!' Odium said. 'This is remarkable.... You did this without access to Fortune, or the Spiritual Realm?'"
Could Fortune be the name of a previously unknown Shard? Taravangian is clearly one of the more Realmatically aware players on Roshar, so it's not too big a stretch to think he might know the names of Shards on other worlds, or that Odium would guess that.