Spellcasting

With the recent ascendancy of Aureon through the ring of Siberys, the persistent pain of wounds no longer affects the casting of spells or use of spell-like abilities.

In game terms this means that, as per the rule book, only an injury that is inflicted during the casting of a spell will call for a concentration check. This means that you will have to ready actions to disrupt it. Of course if it takes a full round action to cast then you can disrupt it with injury as normal.

Consider this to be a revoking of a long-standing house-rule