Online Game: As a Healer, I Deal 999 Damage with One Slash. Is That Reasonable?

[Online Game Invasion, Invincible, Exploiting Bugs, Playing the Pig to Eat the Tiger, Plot, Decisive and Ruthless]

A mysterious online game descends, dragging the world inside, where everyone is forced to become a player.

Lin Chen died in the game and was reborn just hours before its arrival. The soon-to-come [Godslaying Grounds] is exactly the same as the game developed by his company, and, as it happens, he is the game's bug-fixing engineer.

In that case, this time I won't fix the bugs. Instead, I'll exploit them and keep them as a secret only I know!

Bug added: Rusty Iron Sword. Every time it kills a monster, permanently gain one point of Attack.

While everyone else is struggling to level up, Lin Chen is killing monsters with his rusty iron sword.

While everyone else is tackling dungeons, Lin Chen is killing monsters with his rusty iron sword.

Every monster that falls to his blade increases Lin Chen's Attack!

When Lin Chen emerges from seclusion with his rusty iron sword in hand, everyone is stunned.

"Holy crap... Why is this healer dealing 9999 damage with one slash?"

"Watch out! That healer's charging at us with a blade! Run!"

"..."

Reborn, I'll take back with my own hands, one by one, everything I lost and everything that was stolen from me in my previous life!