You basically don't do anything except watch what weird mutations come out from the breeding. In Clusterduck, you can only have up to 30 ducks, so once you hit the limit, you have to throw a duck into the pit to sacrifice it. Sometimes when sacrificing a duck, a large monster spawns from the pit, and if you tap it enough times, it'll spawn a duck with a "cursed" trait of some sort.
https://play.google.com/store/apps/details?id=com.pikpok.wtd...
https://apps.apple.com/us/app/clusterduck/id1531250914
You basically don't do anything except watch what weird mutations come out from the breeding. In Clusterduck, you can only have up to 30 ducks, so once you hit the limit, you have to throw a duck into the pit to sacrifice it. Sometimes when sacrificing a duck, a large monster spawns from the pit, and if you tap it enough times, it'll spawn a duck with a "cursed" trait of some sort.