Spawn location for "chelsithreborn.txt" map file (note for all Chelsith named map locs, see this quest entry):
Casts "Tireless Strike" (on tank) every 40 seconds. Glorig becomes enraged if anyone on his hate list has higher health than he does.
Glorig emotes at 80%, 60%, 40% and 20%. He begins by doing lots of damage, but is susceptible to spells.
100%-80%: He is susceptible to spell casting. This is the time for heavy nukes and debuffs.
80%: He emotes: "Glorig The Underdog channels his anger and challenges all to gather around and confront him!".
60%: He emotes: "Glorig The Underdog allows you to back away but increases his onslaught."
40%: He emotes the challenge text above (80% emote), and is again immune to casting.
20%: He emotes the "onslaught" text above, and can be nuked to his death.
He always drops a Tier 3 visible piece as well as three non-visible pieces, and usually a spell dreadmote.