I trapped a warden in my zoo, then built a creeper generator under it so that every once in a while the warden gets to yeet a creeper.

This would make a terrible farm, ultimately the warden just stares at them a lot and half the time they despawn. They also don't spawn too often, but that's because this is a zoo with trapped hostile mobs all over and I think it impacts the rates. I also spammed sensors and shriekers to try to make him angrier faster, but it didn't really help. That being said, you just make a plus farm under them with a cat in the middle; they get scared and run into a bubble column which pushes them into a pool where they can be seen by the warden, but not close enough to hurt him if they explode.

This is for a zoo, so the idea is that viewers can see the warden but not get blasted by him, and can get blindness by going up on the observation platform. Occasionally, like the goat in Jurassic Park, it acts like a predator, but just like in the movie, it's disappointing a lot of the time lol.