full moon alchemist? i don’t think its exactly what you’re looking for though its more fantasy bl and not action oriented
If you don’t mind novels then
If You Don’t Become the Main Character, You’ll Die
https://www.mangago.zone/read-manga/sweetie_sweetie_sweetie/
https://www.mangago.zone/read-manga/don_t_press_the_button/
https://www.mangago.zone/read-manga/possessed_by_a_cotton_ball/
https://www.mangago.zone/read-manga/the_fallen_duke_the_knight_who_hated_him/
https://www.mangago.zone/read-manga/eternal_covenant/
https://www.mangago.zone/read-manga/to_deny_the_route/
https://www.mangago.zone/read-manga/hey_prince/
https://www.mangago.zone/read-manga/regas/
https://www.mangago.zone/read-manga/love_supremacy_zone/
https://www.mangago.zone/read-manga/i_can_see_your_stats/
https://www.mangago.zone/read-manga/necromancer_survival/
https://www.mangago.zone/read-manga/stigmata_1/
https://www.mangago.zone/read-manga/kiss_the_abyss/
https://www.mangago.zone/read-manga/to_be_or_not_to_be/
https://www.mangago.zone/read-manga/silver_diamond/
https://www.mangago.zone/read-manga/the_affairs_of_the_other_world_depend_on_the_corporate_slave/
https://www.mangago.zone/read-manga/zettai_bl_ni_naru_sekai_vs_zettai_bl_ni_naritakunai_otoko/
https://www.mangago.zone/read-manga/kocchi_muite_glare/
https://www.mangago.zone/read-manga/doku_wo_kurawaba_sara_made/
Have you read any of these? (≧∀≦)
Something like ‘Turning’ or ‘the grandmaster of demonic cultivation”
Preferably with smut-
(I’d love a great slow burn too tho-)