MTL - Mystery Makes Me Strong - Chapter 669 found it

When the forgotten past and the mysterious future collide, its up to those stuck in the middle to put a stop to it.Join Stanford “SK” Kirby, a mild-mannered deliveryman and amateur comic book writer, as he fights both the monsters of humanity's past sins and the machinations of their future mistakes.But how is someone this unqualified supposed to do something like that?Why, by creating superheroes, of course!“I have no fear, Operator! For I am here to save the day!”“And I just created a literal knight in shining armor. Alright, let's do this thing. AIM FOR THE DRAGON!”“The mechanical one or the anatomically correct one?”“YES!”

Anyone who could construct a stable Spell Model could become a Wizard — that was the Wizards’ ultimate secret! Having been given a new life as the son of an aristocrat and armed with a super quantum computer from his past life, Spell Models came as easily as breathing to Merlin. With this overwhelmingly huge advantage, would Merlin become the greatest Grand Wizard of all time?

- Description from Novelupdates

Gawain is dead and was transmigrated, but there was a slight problem during the process.
After floating for more than a hundred thousand years on a different continent, he felt that he might need a body to become a complete transmigrator, but he did not expect that…

Poison — a cold-blooded assassin, abandoned by his family and cast into the shadows of the underworld. He lived without purpose... until a supreme being took notice.Just like that, everything changed.---In a world of swords and magic, rumors spread of a strange, otherworldly café. A place where both mages and ordinary people can enter foreign realms, fight legendary battles, and return with enhanced magical power and understanding.But there’s one rule whispered by all who know of it:Never offend the owner.He may look lazy, uninterested, and far too calm...But those who challenge him are never seen the same way again.They become “special slaves” — forever bound by punishment and magic, trapped in service to a man far more terrifying than he appears.---He owns the café. He controls the worlds. And now, he’s just getting started.