<p><a class="Link" href="https://chicago.suntimes.com/blackhawks" target="_blank" >Blackhawks</a> general manager Kyle Davidson finally made a big trade Tuesday. How it pans out could determine his long-term legacy.</p><p>The Hawks acquired offensive defenseman Bowen Byram from the Sabres —&nbsp;as well as fourth-line forward Jordan Greenway —&nbsp;in Davidson's first aggressive building-up move after years of rebuilding.</p><p>The cost, however, was high: the fourth and 45th overall picks in this weekend's NHL draft, plus defenseman Louis Crevier.</p><p>The Hawks believed it was increasingly likely that if they kept the No. 4 pick, they would end up using it on a defenseman.