As teams look to piece together trade packages for Kevin Durant, there are certain players that are untouchable to Kevin if he lands there. 

For instance, sources close to Durant say that he's only considering going to the Miami Heat if Jimmy Butler, Bam Adebayo, and Kyle Lowry remain with the team. According to Sam Amick of The Athletic: 

"As for the Miami possibility that also seems to be in play, I'm told there's a significant obstacle on that front. Durant, it seems, would only want to play on a Heat team that includes Jimmy Butler, Bam Adebayo and Kyle Lowry. So even if the Heat were willing to move Butler in a deal as a way of satisfying the Nets' (understandably pricey) request, doing so would leave Durant discontented from the start."

Despite putting his preferences out there, Amick says there is logical reason behind a deal not getting done to send KD to Miami. 

"As others have pointed out, Adebayo comes with a complication of his own even beyond the fact that Durant likely wants him to stay. Since teams aren't allowed to have two players on designated rookie-max extensions who came their way via trade, Brooklyn would have to trade Ben Simmons to bring in Adebayo. If the Heat's best offer is centered on Tyler Herro, I just don't see how that ever gains any traction."

Source: Bleacherreport.com