It's the return of the Halloween Event from 2004 (which was skipped last year). While it's in effect, you can 'trick or treat' in a zone that's level-appropriate for you (for lvl 50, PI, Rikti Crash Site, and the Shadow Shard), that is, click on doors, any doors. Sometimes you get treats (inspirations), sometimes you get tricks (Halloween monsters, witches, werewolves, Fir Bolgs(the event was the first appearance of Eochai and the Fir Bolgs), sometimes a rock (an homage to Charlie Brown). There are badges for killing these critters, too.
Newly added for this year is the special Event Salvage needed to unlock the 5th costume slot. The contacts for this are Annah in Croatoa (just SE of the Green Line) and Granny something in Nerva (on the island that you appear on when you use an SG base telepad to Nerva). "Broad-minded is just another way of saying a fellow's too lazy to form an opinion." -- Will RogersGlobal: @Jimmy Amp
"Broad-minded is just another way of saying a fellow's too lazy to form an opinion." -- Will Rogers
Newly added for this year is the special Event Salvage needed to unlock the 5th costume slot. The contacts for this are Annah in Croatoa (just SE of the Green Line) and Granny something in Nerva (on the island that you appear on when you use an SG base telepad to Nerva). "Broad-minded is just another way of saying a fellow's too lazy to form an opinion." -- Will RogersGlobal: @Jimmy Amp
"Broad-minded is just another way of saying a fellow's too lazy to form an opinion." -- Will Rogers