I've seen him make some big hits. I know he was suspended at least once for a hit in the SHL.
He's not the guy that's going out there hitting everything that moves, but he has the ability to punish people when the opportunity presents itself.
Yeah, but those suspensions were because in the SHL they are much stricter. Any contact with the head is an immediate suspension, regardless of disciplinary history.
Those hits won't result in anything in the NHL. By NHL standards he isn't aggressive, he is however (as you stated) a guy that punishes people if they are putting themselves in those situations.
Jarin Chmelař, who was mentioned here as well, is more physical than Edström and really needs to pick his battles otherwise he could definitely be on the path to suspensions once he makes it to the NHL.
So Sykora was signed to ELC right away after being drafted that allowed him to join Hartford at D+2?
That is exactly it, yeah. This applied to Karl Henriksson as well. The NHL transfer agreement applies to most European leagues except the KHL. Prior to (I think) 2019, the Swiss leagues were also exempt from this but they joined with the most recent extension of the agreement. I can share a copy of the document with you if you'd like.