@GibyBRO No way to tell if you were the champion from the previous match there, for double duty you have to start by being announced as the champion, then win the game as the kill leader.
The 4 blade assassin is from 100+ games with 5 or more kills. Again no way to tell what your previous total was by just the screenshot. 5-14 games with 5+ kills is 1 blade, 16-49 is 2 blades, 50-99 is 3 blades, over 100 is 4.