As Drogn suggested, the universe is a Big Place. These three were as far as I'm assuming the first Entities to visit the Milky Way... Alhazred may have known of them, Belka certainly didn't, and this is the first Midchilda's ever seen of them.
It's explicitly laid down in Worm that they 'mark' their territory and that others of their kind are "extremely unlikely" to follow, assuming that they've pretty much mined out whatever is available to be had there.
Why is the Wall still up? Scion wasn't actively maintaining it, any more than you do the walls of your house. It's not going to fall over just because he's dead. Probably. Then again, Eden helped put it up, and she's been dead for 30 years now..... oh dear.
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Sucrose Octanitrate.
Proof positive that with sufficient motivation, you can make anything explode.
It's explicitly laid down in Worm that they 'mark' their territory and that others of their kind are "extremely unlikely" to follow, assuming that they've pretty much mined out whatever is available to be had there.
Why is the Wall still up? Scion wasn't actively maintaining it, any more than you do the walls of your house. It's not going to fall over just because he's dead. Probably. Then again, Eden helped put it up, and she's been dead for 30 years now..... oh dear.
--
Sucrose Octanitrate.
Proof positive that with sufficient motivation, you can make anything explode.