Talk:Ur-Dragon/@comment-5227769-20120624122330/@comment-5097251-20120624130653

You get some drops by destroying a heart, but you can get these from the offline version.

You can get some of the online rewards by simply contributing a large amount of damage to it over the course of several encounters - there is a chance destroying a heart gets you better rewards, so it may pay to focus on the weaker hearts you can see.