Kemono no senso

a anthromorphed Kaiju alternate universe where the monsters fight in the times from 1603- 1868 (edo period)

destroyah disobeyed his shogun and was supposed to be killed but he could flee thanks to his form switch. during his retirement and the hiding he found a bird like creature (gigan) in a horrible condition. he decided to take care for him and teaching his fight abillity's. destroyah came to the idea to forming a army of rebels against the cruel rights of the shogun's claws.

unfortunartl the story isnt about him but about his student gigan and his pal Megalon.