Engvall, thankfully, was alright after taking a head-first spill into the end boards, but the NHL absolutely must take a look at this hit by Bastian. While this was not an illegal check to the head, it certainly was not any less dangerous and, when last I checked, boarding and hits from behind can also be worthy of a suspension.
There are certain types of plays that don't belong in the game. This is one is one of them. If the aim is to remove plays like this, then the Department of Player Safety should make an example of Nathan Bastian, who could have easily ended Engvall's career on that play.