Remarkable, yes... they can grant considerable powers to others. A few were implanted into weapons, and they grant the wielder powerful abilities... again, provided they're compatible.
[All this he knew thanks to observation of the Relics the Kingdom used, and Sothis's disgusted and furious hisses when she realised what they were and where they must've gotten them from.]
Crest Stones are dangerous to you, unless you have its corresponding Crest. A...
[What did Sothis call it? She had gone on a longwinded explanation on what a Crest Stone was where Byleth understood about 5% of it because she tossed around words he had never even heard before. Eventually she had given up when she had noticed his blank expression and glazed over eyes, though she had dropped the topic with an ominous 'I'll have to build up your foundational knowledge first, I see'.]
A 'genetic marker' that stops it from rejecting you.
no subject
[All this he knew thanks to observation of the Relics the Kingdom used, and Sothis's disgusted and furious hisses when she realised what they were and where they must've gotten them from.]
Crest Stones are dangerous to you, unless you have its corresponding Crest. A...
[What did Sothis call it? She had gone on a longwinded explanation on what a Crest Stone was where Byleth understood about 5% of it because she tossed around words he had never even heard before. Eventually she had given up when she had noticed his blank expression and glazed over eyes, though she had dropped the topic with an ominous 'I'll have to build up your foundational knowledge first, I see'.]
A 'genetic marker' that stops it from rejecting you.