Return of Reckoning

we stormed TM keep , i was guarding another chosen, had toughness, resists and self heal auras up, while going up to 3rd floor got "terminated" and saw this strange system message.

don't know what wrong i was doing ; could someone explain please ?

I can change the message to be more clear, but in essence you are not allowed to go to the 3rd floor until you have a solid master tank with aggro build on Keep Lord. If Keep Lord targets you and you are above certain Z you will get a terminate.

many thanks for the clear explanation.