The Hammer 

If the name “Tiny” brings to mind a diminutive rogue befitting the name, think again: Tiny is a headstrong, muscle-bound warrior who would rather smash his way through obstacles with his trusty warhammer than use his brain. When Tiny and the legendary Ten Knights of Asran are defeated by the Demon Beastlord Gluttony, he is given a second chance at life as he is magically sent back to the past. Relying on his knowledge of the future, the young Tiny must right the wrongs of the past and prepare for the upcoming battle! (Source: WEBTOON)