There is a Legacy version
here.

Embed Aeon Stone Feat 2Archetype Downtime Skill Source Rival Academies pg. 116Archetype RunelordPrerequisites trained in
Crafting;
Runelord Dedication
You discover the secrets to embedding
aeon stones into your flesh. You spend 1 day attuning to an
aeon stone and physically embedding it in your skin. While the stone is embedded this way, you gain the benefits of the
aeon stone as if it were orbiting above your head, but it protects the stone from being noticed or stolen as easily.
Aeon stones in your flesh must be invested to function, as usual.
You can also use this activity to safely remove an embedded
aeon stone in 1 day. Someone without this feat can attempt to surgically remove it safely by spending 1 day and succeeding at a DC 30 Medicine check, or hastily by simply ripping it from a corpse.
Embed Aeon Stone Leads To...
Aeon ResonanceTraits
Archetype: This feat belongs to an archetype.
Downtime: A mode of play in which characters are not adventuring. Days pass quickly at the table, and characters engage in longterm activities.
Skill: A general feat with the skill trait improves your skills and their actions or gives you new actions for a skill. A feat with this trait can be selected when a class grants a skill feat or general feat. Archetype feats with the skill trait can be selected in place of a skill feat if you have that archetype’s dedication feat.