I have a passive skill.

"Is the strongest skill in the world a skill that needs to be actively used?"
"Wrong! It's a passive skill!"
"What is a passive skill?"
"Passive skills are instant active skills, killing moves that no one can guard against, and the ultimate trump card that only the dead can know!"
"Could it be easier to understand?"
"Breathing, strength, perception..."
"Huh, is that all?"
Xu Xiaoshou ripped apart the galaxy with a sword, and everyone was shocked.
"..."
"Is this also called a passive skill?"
"Well, proficient in swordsmanship."