Pro Tip, U Fucking Cannot

''Don't kid yourself. Don't even try. Just give up, admit It Can't Be Done, and go home.''

When the Main or Hero is about to go up against an enemy who holds a perfect record, a Final Beast, or attempt the Final Challenge. This is because the task is incredibly dangerous and could would kill the Main or Hero the moment they try to accomplish it. However, since the one taking the challenge has no choice, has too much determination to quit now, or was told by the enemy that They Fucking Cannot but wouldn't let mere words dash their purpose to fight, they push forward anyway in spite of what they've been told.

Outside of the Main Cast and Team, anyone else who tried accomplish a goal They Fucking Could Not would have been destroyed by said goal, evident by how they were injured, killed, or reduced to bones after taking on the impossible. If those people are still aive and get a chance to talk to the Main or Hero when it's their time to take a shot at the Final Challenge, they might discourage the main character from making an attempt at completing the Final Challenge, unaware of the one they're talking to being a protagonist. In franchises not so keen on giving its protagonists auto-wins at everything they try, these warnings could actually mean something later down the line as the taker of the challenge, one way or another, fails the task. This is typically limited to simply having the protagonist fail their mission and delaying them from victory, but in rare cases, this could kill them if they're not careful or the challenge is too difficult.