We've got a lot of folks here that have played tons of TTRPGs I'd never even heard of before, and we've had a few threads about everyone's favorite mechanics from different games. I'm curious about some examples of incorporating one game's system into another because of something they used that was just too good to pass up.
I've started using Blades in the Dark's clocks in everything, especially with how easy they are to integrate, but not every mechanic is so simple. I've run a few games of 5e with 13th Age's Escalation Die, which requires a little mathematical shenanigans, and I spent a decent amount of time converting adventures from previous editions into 5e.
What about all of you?