Ace 1971 paperback (#13972; cover by Kelly FreasK, 174 pages, 75 cent cover price.) Condition is Fine: very tight and square with flat spine, age tanning is very mild and uniform; faint line near spine on back cover. No stamps, marks or writing - this looks new/unread.

Day of Wrath - Humans and Beasts alike were licking their wounds after the bloodiest battle in cosmic history. They had been pawns of Heljanita the Toymaker. Heljanita had used what he considered to be the deadliest weapon - a 10,000 year distortion of time. His purpose: to obliterate a world he'd hated. But his new world was a powder-keg. For 2 of his victims, stranded in time, were determined to fight back. Time, as before, was manipulated, twisted,bent and perverted... up to a point.

[Another illustration of content, from the inside cover]: "I made you," said Heljanta calmly. "I made everything that you are, with the help of the crooked wheel. I needed a man to win me the Beast war; a man to smash the Humans and at the same time to make sure that the Beasts did not win.
"So I found a man who was nobody; a man nobody wanted to know, and who wanted to know nobody.
"I turned a pathetic nonentity into a deadly weapon... You were the Beast war, Lord Chaos."
Faced with this truth about himself, Mark Chaos had to make a decision. He held the balance between Heljanita and Darkscar, between chaos and absolute order. And Mark Chaos had to choose, while the whole Universe - past, present, future - tottered toward disaster...