Currently monsters entering town are controlled by Gm's or a player led ulber or 2. Whilst this is exciting imagine a swarm of literally dozens of ulbers entering Hydlaa via the east gate intent on a looting rampage. Killing anyone close by....
Weve seen it at the mines. So why not the plaza ? The 2 guards at the east gate are slain by overwhelming numbers etc. Perhaps one of 1 of the 200 or so (just a figure off the top of my head.) Ulbers drops a Water glyph or something of equal value. Time it on market day hehe!! imagine the carnage - All those poor townies being slaughtered - . Now this would be a memorable event.
To combat lag (a) Have WAVES of ulbers not all 200 at once (b) not all clustered close together. And ULBER Ulbers not pansies. So a cockey Brw mage thinks hehe..I can PWN these.. and dies..LOL.