Honestly thought his play against Tyrvainen on Lulea should make the cut. He lost the puck behind him at the offensive blueline, and Tyrvainen looked like he was sprung on a breakaway. He reached back with his stick and stole it away from Tyrvainen, and initiates a re-entry into the offensive zone. It was spectacular. That was a top 3 defensive play he made, imo. Another play he made that didn't get featured was again, against Lulea. A forward had the puck in prime scoring area around the net with no defenseman between him and the goaltender, and Seider somehow came from out of the corner to poke it through his opponent's legs before they could even get a shot off.
That first play actually wasn't offside. I just replayed it like 10 times in slow mo. It was right on side. What a shame, could have been a nice tip in from Mo after driving the net.