Event mystery boxes are rewards from the Deathbeard's Demise seasonal event. Two of these boxes are awarded for turning in 6,000 phantom doubloons to Captain Deathbeard. Alternatively, 500 phantom doubloons can be directly converted into a mystery box (at the expense of not progressing further in the event, however).
It can be opened for a random selection of rewards, and it is destroyed upon opening. Five empty inventory spaces are required to open it.
These thematic rewards may be obtained by opening an event mystery box throughout the duration of the event.
|Walk the Plank emote|
|Jolly Roger cape|
|Ship's wheel shield|
|Crate o' peg legs|
|Crate o' fake beards|
|Pirate titles pack 1|
|Pirate titles pack 2|
Four or five of the following are rewarded. Since this is less than double the amount of items as the regular-sized mystery box, despite the big box costing double the amount of doubloons, it is not recommended to convert doubloons to big event mystery boxes. There does not seem to be an increase in rarer items for big boxes, but the special rewards might still be more common.
|Small prismatic lamp||1||Uncommon||Not sold|
|Medium prismatic lamp||1||Common||Not sold|
|Large prismatic lamp||1||Uncommon||Not sold|
|Prismatic small fallen star||1||Uncommon||Not sold|
|Prismatic medium fallen star||1||Common||Not sold|
|Prismatic large fallen star||1||Uncommon||Not sold|
|Advanced pulse core||2||Rare||Not sold|
|Small cash bag||1||Uncommon||Not sold|
|Medium cash bag||1||Rare||Not sold|
|Large cash bag||1||Rare||Not sold|
|Small dungeoneering token box||1||Uncommon||Not sold|
|Medium dungeoneering token box||1||Common||Not sold|
|Spirit ruby||1||Uncommon||Not sold|
|Spirit diamond||1||Uncommon||Not sold|
|Tight spring||50||Rare||Not sold|
|Silverhawk down||25||Rare||Not sold|