Reborn Raven: Starts with Unlimited Lifespan

"I'm super, why did I turn into a bird?" "The system doesn't have it either. Let's play... Wait, I have unlimited lifespan?" Bring me the Krypton Life Upgrading Technique! A forbidden technique that burns life-span and explodes seeds? Give me more strength! The villain is too strong and I can't beat him with Krypton Life. I just lie down on the spot, wait for the villain to die of old age, and then dance on his grave! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.