My character's god had charged him to prank the bad guy. The bad guy hates to lose and we were gonna confront him in his casino, so the plan was to act like my PC was angry and drunk and would challenge him to a game we knew the bad guy would be likely to cheat at

Unbeknownst to him, my artificer had created a duplicate of the bad guy's cheating device, but altered to make it produce BAD luck instead. We had a helpful rogue ally do the swap, and then we sat down to a round of Gambit of Ord, which is a dice gambling game. The device gave a -2 to the bad guy's rolls.

My PC beat him, 9 to 8.