“Devil’s War” is a 17-page Kirby story from DEVIL DINOSAUR #2 , inked and lettered by Mike Royer, coloured by Petra Goldberg.
“Were dinosaurs as smart as men? If their kind was known on Earth for 750 million years, one of them was bound to have learned something!”
Thus begins the second adventure of T. Rex Devil Dinosaur and his young companion Moon-Boy. As this issue begins, they almost fall into a trap of spikes in a pit laid by the Killer-Folk and their leader Seven Scars. They escape that but then are caught in a rockslide which buries Devil and knocks out Moon-Boy. Moon-Boy is taken to serve as a sacrifice in the cave of Long-Legs.
Devil soon manages to dig himself partially out when he’s confronted by an iguanodon.
A short battle follows, and the victorious Devil uses his sense of smell to track where Moon-Boy has been taken. Moon-Boy is tied up as a sacrifice to a giant spider when Devil bursts in with a burning stick from the flaming forest, rescues Moon-Boy, crushes Seven Scars and forces the rest of the Killer-Folk into the cave of Long-Legs to meet their fate.
It was a rough life back in the dawn of times, and DD was clearly a take no prisoners type. This is a really fun comic, especially the way that Kirby draws Devil, with a lot of personality, and how he emphasizes Devil and Moon-Boy’s mutual loyalty to one another.
DEVIL DINOSAUR OMNIBUS 
DEVIL DINOSAUR BY JACK KIRBY – THE COMPLETE COLLECTION