Now that he knows that both Erythra and Nerissa are going to heaven, Natsu has to pull harder. He realizes that they can control everyone in the Tower of Heaven, and he wants to welcome them all. He explains that he intends to sacrifice Erza so that he can revive Zeref, but if they manage to stop him, then they win. He also explains that they cannot reach him without going through three knights. Finally, he explains that if they get hit with the etherion, they're all headed straight to hell. He says that the Justice Knight, Fukuro, has come to kill him. The Justice Knight will bury his evil deep, he says.