Delorean

Delorean (デロリアン, Derorian) was a Mysterious Being that Saitama killed before trying to get a drink from a vending machine.

Appearance
Delorean is a large four legged monster with sharp teeth and claws. It also had a row of spikes going down his back to his tail.

What Can't Be Bought
Delorean is killed before Saitama goes to buy a canned drink. Shortly after, D-Pad and Funeral Suspenders came to put barrier tape around the monster.

Abilities and Powers
His body secretes acid and touching him means being "dragged to hell".