X-Ecutioners is just a reference from We Bare Bears. during the verse that Baby Grizzly sing in Play the Game.
"Anyone can play this game, Just watch, now take a throw, and the balls get knocked down it's easy as 1, 2, 3 step 3 being taking bears home, you see (Come on!)" the sound similar to Mike Shinoda rap from the song "It's Going Down".