Russell Westbrook offered something of a warning to the rest of the NBA regarding his reunion with new Houston Rockets teammate James Harden.

“It’s going to be scary, that’s all I can tell you,” Westbrook said during Rockets media day Friday. “It’s going to be scary — not for us.”

Seven years have passed since Westbrook and Harden last played together with the Oklahoma City Thunder in the 2012 NBA Finals. Harden and Westbrook, who have been friends since their childhoods in Los Angeles, have developed into perennial All-Star guards, and both have won an NBA MVP award.

But neither superstar has made it back to the NBA Finals since the Thunder’s 2012 loss to the Heat.

They pushed to reunite with the Rockets, who traded Chris Paul and a package of first-round picks to acquire Westbrook from the Thunder, in large part due to their desire to finally win a championship.