Talk:Ur-Dragon/@comment-112.198.90.115-20140131083125/@comment-5166842-20140131235228

Eventually each generation of the Ur Dragon will die. When that happens is when the grace period starts, server-wide. Grace won't start for you if you're in the middle of a 'session' fighting him, but if you exit the chamber and reenter you'll recognize grace by the life bar, which will have a tiny sliver of health showing, and by the dragon's appearance, he'll have one or more hearts glowing bright red (not all of his live hearts will necessarily be glowing bright red though). You'll have the standard 10 minute sessions to try to destroy all his live hearts. Damage does not accumulate over sessions, so you want to really pay attention during your first fight as to which of his hearts is the strongest (you may want to use a Maker's Finger on that heart during round 2), and if there are any tail or wing hearts to account for, so you go back to the 2nd session with a more efficient plan.

Some graces are extremely tough, and those will often last an hour or more, so you'll have many chances to get him. On the opposite end, he can actually show up with one heart, in which case a single Maker's Finger ends the fight almost before it starts. In my experience the grace period always lasts at least 30 minutes.