I'm Doing Magic Spells in the Ninja World to Fight Back

Thank you for the invitation. I am in the ninja world and have just gotten out of the hospital bed! Surrounded by a group of men in black robes with wild and crazy eyes, there was also a gray man with a big back named Hidan who was laughing wildly at him. Just because he was the second 'lucky person' to successfully 'survive' and obtain [immortality] in this divine selection ceremony. Shinji Akagi is a bit numb... What made him even more depressed was that after the transformation, his body had no chakra, but he could no longer practice any ninjutsu. This means that he will become the first immortal and useless ninja! But the activation of a strange system brought new changes to his life. Can't learn ninjutsu? Small problem! There are all kinds of magical spells for you to choose from! Red blood manipulation, cud soul spells, ten kinds of shadow spells... Everything is available. Wait a minute! Why is there still [Cursed Wind Cave]? ! Is this considered a spell? ! ! ! Forget it, just do whatever you want, the field expands, and there is infinite space!