Page intentIncubator guide
Unlock and capacity
Community testing documents a 300,000 Cash and Rebirth 3 requirement, ten levels, and up to 60 eggs of storage.
Same-server luck
About 90 minutes in the same server is reported to add 10% rare-egg luck. This is community-tested rather than an official published formula.
Rebirth warning
Creator testing after Hotfix 1.1 still observed an incubating chicken being consumed by rebirth. Remove valuable chickens before resetting.