Guardianship law generally applies to persons who cannot care for themselves, which raises an immediate classification problem for a dragon egg: it is not yet a legal person, but it is also not ordinary property, since it contains the potential for one.
Most jurisdictions handle unborn or pre-hatch entities through a trust structure rather than direct guardianship, appointing a custodian responsible for incubation conditions until the entity achieves independent legal status upon hatching.
Incubation responsibilities should be documented clearly, covering temperature regulation, security from theft or predation, and a contingency plan in the event the custodian is unable to continue care through the full incubation period, which for dragons can span several years.
Ownership transfer becomes complicated if the egg changes hands during incubation. Courts would likely apply a bona fide purchaser analysis, examining whether the new custodian had notice of any existing guardianship arrangement before taking possession.
Liability exposure exists on both sides. A custodian who neglects the egg may face claims for damages equivalent to the egg's appraised value, while a custodian who successfully hatches the dragon may face entirely new liability categories once the hatchling begins asserting its own preferences forcefully.
Upon hatching, guardianship should transition smoothly from asset-based trusteeship to conventional minor guardianship, with the same custodian typically continuing in the new role unless the arrangement specifies otherwise.
The safest practice is a written incubation agreement specifying custodial duties, transfer conditions, and a clear point of legal transition at hatching, reducing disputes during what is otherwise a fairly opaque and lengthy waiting period.