I used to be a tournament Magic: The Gathering player. Used to participate in the european championships and the french nationals every year. I was a big-time player at the age of 15. Essentially, I was a nerd badass with a pure-black deck that made me undefeated for a year and a half. It cost around 800$ to build it throughout two years of play to the point where that deck was practically a work of art. I know I'm probably wasting my breath here, but it was built with such exactitude that there was no possibility of a bad draw or a stale turn.

Anyways, when I moved to the USA to finish high school, I got involved in the MTG club that was going on in my new town. Did a few matches with proper judges (my deck was all in french, so they needed to mediate by looking at the pictures) and properly kicked everyone's asses. There was a kid who played with me who I would later realize was the perfect "internet troll". He always talked about gaming, furries, forum posts, and obscure geek topics. His hygiene was also severely lacking.

That little shitstain stole my pure-black tournament deck in the space of the three seconds it took me to turn around to get my jacket. He just pulled it straight out of my bag and zipped it back up. The only reason I realized that he was the one who stole it was because after a day of frantically looking, I found him throwing the whole deck into a deep puddle. It was completely ruined, and his only excuse was "the cards were in some other weird language. no one wants them".

I did lay him out on the pavement for that, though, so at least there's that. I haven't played MTG since.