The Pittsburgh Penguins are about to take on a defense corps the likes of which they haven't met through the first three rounds of the playoffs.

In fact, the Penguins' toughest test was last round when they faced Ottawa Senators captain Erik Karlsson, but as Chris Kunitz suggests, the Predators are a different beast.

Game 7 hero Kunitz on #Preds: "They have four 'Karlssons' on their team. — Sam Carchidi (@BroadStBull) May 26, 2017

Kunitz is likely referring to the Predators incredibly strong top four, which includes Roman Josi, P.K. Subban, Ryan Ellis, and Mattias Ekholm, a quartet that has combined for 11 goals and 41 points in 16 games.

All four of the men above sit in the top eight among points by defensemen this postseason.

The Penguins will certainly have their hands full, but luckily they aren't actually facing a team of four Karlssons. That would be downright terrifying.