[LV1][LV2] (Your Attack Step) When you Advent, put one core from the Void to this Nexus.
[LV2] Flash (Either Attack Step) By send all cores from this Nexus (at least 3) to your Trash, you can summon one Cost 5 or less "Winged Beast" family Spirit card from your hand without paying the cost.
A bird's nest at the world's highest elevation. You can't approach it when the parent birds are present, so just watching it takes a lot of luck. Hence, it's become a famous spot for testing one's luck. Touching the egg is absolutely not recommended. -from the Places of Interest 627/1000 of "New Record of the Strange World"-