Oric is standing here, in front of their lair:
If you wish to join, no matter your class (but you should be level 35 or higher), come! Let’s meet at the entrance, let’s chop up some kittens! Halfling rage! Oh, and bring some alcohol.
Oric should arrive around 13:00 CET (12:00 UTC/GMT, 7 AM EST, 4 AM PST) and he will pass his time staring at the clouds looking for shapes of animal skulls until some people show up. If no people show up, he will drink himself to sleep and retry next week.