Yuusha Party wo Tsuihou Sareta Shiro Madoushi, S Rank Boukensha ni Hirowareru: Kono Shiro Madoushi ga Kikakugaisugiru

Lloyd is a member of the most illustrious Hero's party—wait, what do you mean “not anymore”?! Kicked out for being too weak, no one seems to realize that Lloyd is actually an absurdly powerful white mage trained by Lady Merlin herself! Manipulating magic is practically second nature to him, regularly leaving even S-rank adventurers stunned speechless. Not that Lloyd has any idea just how strong he really is. Luck is finally on his side when a seasoned adventurer recognizes his worth and scoops him right up into her party. But their first quest to hunt a pack of high wolves quickly takes an unexpected turn when the city comes under attack. Now Lloyd must navigate new social dynamics and a quest far more dangerous than it first appeared—and maybe, just maybe, prove his worth along the way. (Source: J-Novel Club)