New elite
The Hollow Jack-o'-Lantern
While you fight through the realms, a grinning pumpkin in a witch's hat may come drifting in with a sack of candy. Expect one about every 20 minutes. A banner tells you when it arrives, and if nobody beats it within 5 minutes it floats away.
3×tougher than the monsters around it
3×the EXP
10Hollow Candy every time, for every player who shares the kill
Reaper's Wings · a 1 in 100 drop. You can't buy these: the only way to get them is to beat a Hollow Jack-o'-Lantern.
It only appears in the realms' rooms, never in the Den, hideouts, boss arenas or Echoes.

Hollow Candy
Every monster you defeat has a 3% chance to drop one, in the story and in Echoes. Everyone who shares the kill gets their own chance.
Spend it at Trick and Treat's candy shop in the Den.
New quests
Four guests in the Portal Room
Hollow Night has brought some odd visitors, and each has a three-part quest line for you. Every part pays Hollow Candy and EXP, 240 candy across all four lines. Finish a guest's whole line and they give you their own cosmetic, one per character, delivered to your Cash tab. The guests leave when Hollow Night ends.
Count DripA vampire who can't stand blood and lives on pumpkin juice.

RewardDracula's Wings
HazelA little witch set on carving the scariest lantern.

RewardHazel's Lantern
Madame BelladonnaBrewing the Hollow Night draught on her broom.

RewardBelladonna's Rose Hat
MildredThe ghost maid hosting the party.

RewardMildred's Lace Cap
While a gathering part is open, monsters drop what the guest needs: Pumpkin Pulp, Candle Stubs, Bat Wings and Cobweb Lace. The Hollow Jack-o'-Lantern always carries the Lantern Glow Belladonna asks for. Other parts send you hunting, or across the room on errands between the guests.
New in the Den
Trick and Treat's candy shop
Two moon bunnies in witch hats have set up shop in the Den. Trade your Hollow Candy for any of 12 Halloween costumes, and try each one on in their mirror first. Their shop also takes you straight to the Hollow Night shelf in the Cash Shop.
Dracula Mask
60
Werewolf Mask
60
Skull Mask
60
Frankenstein Mask
60
Mummy Mask
60
Festival Hat
60
Pumpkin Basket
90
Leopard Umbrella
90
Festival Lights
90
Pumpkin Outfit
120
Festival Costume (M)
120
Festival Costume (F)
120
Pitter and Patter's Hollow Night gifts
Visit the twins every day of the event for a 7-day run of Hollow Night gifts: candy, a Tincture Set, Salvage and a Supply Crate.

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6
On day 7 they hand you Pyuri, a stitched bunny pet. You get Pyuri once per account; after that, day 7 gives extra candy instead.
The twins' usual daily gifts come back after the event, right where you left off.
The Hollow Night shelf
A new Cash Shop shelf in two weekly drops, each with three pets.
Week 1 until Oct 29 · pumpkins and witches
Pumpkin Jack, Pumpkin O and Pumpkin Lantern
Week 2 until Nov 5 · ghosts and the dead
Papa, Nono and Bobo Ghostie
Pet bundles: each week's three pets come as one bundle for 960, 20% off. A pet you already have comes as a Pet Coupon instead. Pick the bundle and the shop's mirror shows your three pets with the haunted house rising behind you.
A haunted house
Bring out three Hollow Night pets (any of the six shop pets or Pyuri) and stand still for 5 seconds: a haunted house rises behind you, and it fades when you move. It stays after Hollow Night ends, because the pets are yours for good.
Other players see it too, unless they've hidden other players' pets in Options.
Jack-o'-lantern pops
While Hollow Night runs, monsters burst into a grinning pumpkin when they fall, and again when they come back.
Every map, dressed for Hollow Night
While the event runs, every map gets MapleStory's Halloween dressing: strings of jack-o'-lanterns on pumpkin-headed poles, lantern trees, candy stalls, pumpkin piles, spider webs and jack-o'-lantern chandeliers. It all packs itself away when Hollow Night ends.
Good to know
From now on, new cosmetics belong to the character who gets them. Everything you already own stays shared across your account, and pets are still shared too. Pet Coupons don't work on the Halloween pets. You can now wear cosmetic gloves.