When it appears, all players on the world receive 3 messages that are broadcasted exactly 6 minutes apart. Morgaroth spawns when the last message appears, exactly 12 minutes after the first message.
00:00:00: The ancient volcano on Goroma slowly becomes active once again.
00:06:00: There is an evil presence at the volcano of Goroma.
00:12:00: Evil Cultists have called an ancient evil into the volcano on Goroma. Beware of its power mortals.
