In the current How to Play list, stealing eggs from guardians is step two, after a backflip reaches a new biome and before hatching.
The short rule and the longer one
The live sentence stops at "steal eggs from guardians." A longer recorded description is more specific:
- Take the egg from the animal holding it.
- Escape that powerful animal guardian.
- Bring the egg back to your base.
That longer text treats the escape and the trip home as part of the theft, not as optional flavor. Because the current official sentence does not repeat the escape or the base drop-off, confirm both the first time you pick an egg up. If the guardian chases, getting away is the recorded plan. The text does not say what a catch does, how fast a guardian moves, or a counter besides leaving.
Which eggs exist
The longer description names five stealable egg tiers, in this order: Common, Rare, Epic, Legendary, and Mythic. It attaches those words to eggs, not to a pet inventory tag. It also says higher stages hold rarer eggs, and that backflip progress is how you reach those stages.
The live How to Play text does not repeat the five names. If your build shows different labels, trust the label on the egg. There is no published per-biome egg table and no numeric power gate.
Guardians are not given species names. See what a guardian is before you plan around a specific animal.
After the egg is yours
Hatching is the next official step, and the longer text places it at your base. Continue with how hatching works.