So pretty much
Oilers dump Campbell(25% retained) + 2 2nd rounders to Sharks for Blackwood. While moving Ceci in the bigger trade through them to eat 50% of his cap for another second acquired via Boston.

Then trade Drai + Blackwood + Ceci(through SJS with them retaining 50% of his contract) -> Lysell, Ullmark, Debrusk, Gryz, 2 firsts and a second(used to retain Ceci)

I just don't see the Sharks as a major winner in this one. They use up a lot of cap which may limit further moves and they don't even get a first. I posted a similar trade yesterday with just Boston which sent Carlo to Edmonton. I think there's a distinct possibility something similar may happen. If Edmonton can pick up some draft picks to move Campbell they could have more options. Even try signing Patrick Kane. It takes gutsy moves by Holland if he wants to save the teams season.

The Bruins wouldn't do this trade, not sure about the other teams. I hate 3 way trades, they get too confusing.

The Bruins would never trade Carlo and nor should they.

I now have a popsicle headache, LOL. The Bruins would have Zero interest in Ceci or Blackwood, so this is a big no-go.