Fairy Tail: My Hextech Runes

Lu En was gaming at home when a mysterious force dumped him into the world of Fairy Tail.

He awakened Hextech Magic and was hailed as a tactical master. In truth, he relied entirely on gacha, using whatever he happened to draw.

Others fought with magic power. He fought with luck:

[Dive Bomb]: Only triggers upon death. A true self-destructing masterpiece!

[Cheat: I Can Return to Base]: Great and all, but which one's my home?!

[Universal Scope]: I don't want to be a melee battle mage...

"I'm Chovy, please, just give me some normal runes!"

From then on, Fairy Tail had a new mage who fought dirty.