In two ways: (1) by sharding one, thus committing yourself to bearing that shard for a given amount of time; (2) having a warder shard, which allows you to ask the names from the shards themselves.
If you discovered that a given set (most discovered caches of shards are sets of 7) with the following names, what would you think they do?
- Ossis Potior | Bone Collector
- Proeliator Lamniar | Blade Bravo
- Umbra Beatus | Saint of Shadows
- Sanomagus | White Mage
- Aduromagus | Fire Mage
- Tripudior Tempestas | Storm Talon
- Cepi Monstrum | Blue Mage