The rule that saves the run
Progress is not the rarest Egg you can touch. Progress is the Egg you can carry home, hatch and use to make the next run safer.
01
Choose the zone
Check the Biome and Speed floor.
02
Measure the return
Carry risk is part of the cost.
03
Record the result
Update the Egg and Pet record after a verified hatch.
What to record
Keep the current Biome, Speed requirement, Guardian, Egg source and Pet income together. When an update changes one field, the connected records need a fresh check too.
Evidence boundary
Mark uncertain spawn rates, mutation multipliers and expired rewards as unverified until you test them in the current experience.