Pavel Buchnevich was acquired way under market-value from the New York Rangers as they couldn't afford to keep him. In his time with St. Louis, he's scored 114 points in 111 games.
As a point per game player, his $5.8-million cap-hit is a true bargain. It will ease the pain of likely losing William Nylander due to the salary cap. Adding a superstar forward line Buchnevich could be what puts the Leafs over the top.
It wouldn't be cheap, but if Kyle Dubas could pull this off, it could be a franchise-altering move.