North Korean leader Kim Jong Un said he will make President Trump “pay dearly” for his speech to the United Nations General Assembly on Tuesday.

“I will surely and definitely tame the mentally deranged U.S. dotard with fire,” Kim said of the speech, which he described as “calling for totally destroying” North Korea. Speaking to world leaders in New York on Tuesday, Trump taunted Kim, calling him “Rocket Man,” and warned that the U.S. would have “no choice but to totally destroy North Korea” if the rogue regime threatened the U.S. or its allies.