Lol.. Portal stones usually open portals, likely they want to summon more daimons given their recent losses.
Actually...to my knowledge, that's never happened.
Portal stones are used to close portals, not open them.
I'm pretty sure the idea that they could open portals started on other continents when they started showing up there, and eventually migrated back to BT. But there is nothing that any dev or GM has done (to my knowledge) to encourage this belief. It's purely a player invention.
