In 2347 AD, Ragnarok detonated the world, and the divine power turned into "primary energy" radiation. Civilization collapsed, mutant beasts ran rampant, and survivors huddled in underground fortresses. Slaine Bloodthorn, an abandoned son of Team 7 of the Shadowfangs, was used as bait and thrown into the radioactive wasteland. Before he died, a piece of Titan Divine Crystal burst out of his body - a portable training room! 10 Times the internal time flow rate, 4 hours outside = 40 hours internally. But every time it is turned on, it burns for 1 day. And every time he uses his explosive skill, his lifespan will be reduced by another year, and it will take another 3 seconds to cast the spell. Even more desperate is the fate of Tiansha Lone Star: Anyone who has a deep emotional bond with him will suffer a bloody disaster within 30 days. Evelyn Frostblade, a descendant of the Frost Giants, bumped into him practicing while being hunted; Cecilia Nightsong, of the blood of the fallen angels, took the initiative to sacrifice to live with him; Elsa Ironheart, the reincarnation of the Nordic Valkyrie, smashed the door of his sanctuary with one punch... The three women all said: Your destiny is exactly the contract of the fall of the gods that we need. When three major killer organizations join forces to encircle and suppress him, Slane is forced to use his life-extending special move. The moment the countdown in the training room reached zero, he discovered the truth about the evil star. He was the only savior left to the wasteland by the gods.