In order to be able to enter the wow classic Upper Blackrock spire dungeon (UBRS), you need to complete the Seal of Ascension quest which will also grant you a Seal of Ascension ring. This ring is a must-have in order to enter the UBRS and it also can be used in the dungeon to summon Vaelan during the Warchief Rend Blackhand encounter.
Requirements to buy wow classic upper blackrock spire (UBRS) attunement:
Active WoW Subscription
Level 60 character. If you don't have one you can buy a wow classic power leveling service from us