Nikita Gusev is a restricted free agent that has played the last decade in the KHL. His rights were traded in the Vegas Expansion Draft from Tampa Bay to Vegas in order for the Golden Knights to select veteran defenseman Jason Garrison over younger names in Yanni Gourde, Andrej Sustr, and Jake Dotchin.
In hindsight, Tampa would have much rather kept his rights than allowed someone like Dotchin to leave. Since the expansion draft, Gusev has been the top goalscorer at the World Championships, made it to the KHL All-Star Game twice, led the KHL in assists in back to back seasons, and won the MVP for the KHL in 2018.