Opponent's Liliana, Waker of the Dead Crashes game every turn.
I was playing against a deck using Liliana, Waker of the Dead and every time they would activate it, it would crash the game. The game just blinked off like Liliana's +1 ability was to hit Ctrl+Alt+Delete. I eventually conceded after reloading 4-5 times. I have not seen an opponent use the card since then, so I don't know if it's a recurring issue. My deck was a Gruul deck built around legendary creatures.