Potential Bug with Thunderlord's Decree
With some minimal testing, a friend and I had trouble with the above keystone mastery when multiple people use it on the same team. In a solo custom game I was able to proc. TLD with a w and 2 autos from Talon. In a duo custom game with my friend he was the only one who could proc. TLD no matter how hard I tried. If others could test and confirm; it may be a serious issue.