Japan's heroes and military are in the middle of an all out war with Hell itself. All For One and the League of Villains have struck a deal with Prince Ahzrak, the prince of Hell, to achieve more power over the heroes.

Demons of all shapes and sizes have exited the portals and rushed through the streets, tearing apart everything in their sight, including humans. The Pro Heroes, and the young heroes of U.A High are doing whatever they can to push the demons back to Hell. However, even the likes of All Might and Izuku Midoriya are having trouble doing so... They need someone who has dealt with Hell in the past.

Prince Ahzrak, standing beside All For One in his ship, senses a familiar presence arriving to aid the heroes. Ahzrak: "They have arrived..."

All For One: "And who might this be?"

Ahzrak: "The Slayer."

Class A and B are having trouble pushing the demons back. Each of them are tough to deal with all at the same time.

As they were on the verge of defeat, a blue portal opens up in the middle of the battle. A bulking, green armoured marine steps out of the portal and crushes the skull of a dead Hell Knight with the sole of their boots. Their back is faced towards the young heroes and ready for a rematch.

[Objective: Rip and Tear... Until it is done.]