Quill Fiends are encountered in Acts I and III. They usually rely on hit-and-run-tactics, attacking from range with their quill-darts and scurrying of to safety when you close into melee range. Like with other monsters, it's not unusual to encounter them in small packs. Similar to the Spike Fiends of Diablo II, these creatures fire quills that can be dodged. In Ruins of Sescheron, Ice Porcupines, a more vicious variant, can be encountered.