I sailed through the first 19 rounds with a record of 19-2 - very happy.
Round 20 is a different story - four losses in a row to a dreaded Black Knight champion dragon - I'm going to cycle through my Pyramid, Infinity and Diamond (all Epics) until I knock this sucker off. It should get a little easier for rounds 21-24 but then there's another champion waiting at level 25. Whee! We're all having fun... right?