I am taking a year long trip to train Erza announced. Sure thing Natsu said like he didn't care as he walked to the guild doors. What's up with Natsu Erza asked. I have no idea Mirajane shrugged. Why do you care anyway a voice said from behind Erza. And who are you Erza asked. An old friend of Natsu's and i want to know why you suddenly care for Natsu the cloaked figure said.I didn't know Natsu had a friend outside of Lisanna Mirajane said. We met before he met Igneel, now i asked why you care for him the hooded figure asked. Why should i tell you Erza said pointing a sword at the hooded figures asked. All of a sudden powerfull death magic was felt through out the guild. W-w-who are you Erza asked. I am known as the black mage Zeref, and I come here with a warning if you hurt Natsu I slaughter you Zeref said. Why do you care so much for Natsu Makarov asked. He is my only friend, and the only one with the same curse as me, and is the only one able to control it Zeref said. What do you mean Makarov asked. It's the curse of death whoever has it is able to kill anything around them, but it's hard to control, and if you have it your immortal. So Natsu is immortal Mirajane said shocked. Yes and he is a powerful mage if he uses his death magic, i would warn not to piss him off his death magic could kill me Zeref said. And if you'r asking why Natsu is down today, it's because today is the anniversary of the day he received his curse Zeref said. How would you know that Erza asked. It's the same day i received mine he is my twin after all Zeref said. So Natsu so the twin brother of Zeref Makarov said.