Sokushi To Hametsu No Saijaku Majutsushi

Sokushi To Hametsu No Saijaku Majutsushi summary:

Arc and Lean are aspiring adventurers. Upon appraisal, Lean is revealed to be on the level of a hero, with the level cap of 30 and the skills and ! However, Arc has an instant death magic with a level cap of... 1?!With his instant death magic, he'll becomes embroiled in a national crisis that shakes the world!