@Sdrolion
Sigh... Perhaps I'll make a gate burst herald along with that Hypnos herald if no one else does it. I like the bit about it causing investigators to be devoured. Although it could theoretically be gamed by Arcane insight. Oh. Ban Arcane Insight ;'D Perhaps it should have usual gate burst effects along with a monster surge (starting at that gate), and raising the terror level by 2. I'll think up some other constant effects later I guess.
I just saw your text for corrupted seals. It made me think that gate bursts might cause corruption as well, but apparently that's not where you were going with it ;')
Perhaps I'll have closing a gate cause the drawing of two corruptions.
Or perhaps only one corruption, but hitting the red corruptions causes an immediate gate burst.