Talk:Ur-Dragon/@comment-86.42.121.110-20150727185556/@comment-26821092-20150727190247

The hearts won't be immediately visible if they are completely undamaged. Look for a place on his body where his flesh is still a light grey. Also refer to the image in the article that shows the locations of all his hearts. Go through each location and see if his flesh is light grey and undamaged there.

Sometimes it's hard to tell with his tail, so maybe that's where you're missing.

Also, if you have an auto-aiming ability like Great Cannon, the spellshot will automatically seek out any remaining hearts.