Well, this holiday was a bit…. weak. There is one achievement, which you get by doing /dance with an NPC in the graveyard of your home city. Easiest place to go is in Dalaran, in the little grassy area west of the commerce exchange. Dancing with Catrina will turn you into a costumed undead.

Next, talk to the vendor next to her. You can buy a recipe for Bread of the Dead, do that and make one (using the fire behind the vendor). Also buy either the bouquet of marigolds, or a single one. Use the flower to see the friendly spirits, one is a quest giver. He asks for a piece of the bread you just baked. Completing the quest gives you the pet…. BUT this is the lame part… the pet isn’t a real pet. It takes up a bag slot (not learnable) and is only summonable during day of the dead.