Incredibly rare, the Zel Sentinel are automatons created by the Great Old Ones to guard areas or creatures of extreme significance to the Great Old Ones.   Over the millions of years since they were first created, the Zel Sentinels have been destroyed, lost or have started to fail.   A Zel Sentinel is dangerously without empathy and view anything not aligned with the Great Old One that created them as a threat only to be destroyed. An active Zel Sentinel is dangerous to anything that crosses its path.