Things disappearing from inventory?
Try submit a ticket?
* Event Timer (including HoT Meta), Daily, WvW, Pact Supply, Account. Trading Post, etc:
* Google Playstore Link
You should contact Support and ask for them to look at it.
Use the search function on each inventory and your bank. Make sure none of your inventory tabs are hidden.
You can set up a password with gw2efficiency.com and use the search function to look through your account and characters.
ANet may give it to you.
Is it possible you have opened it? Check your unlocked skins in the wardrobe.
Otherwise, remember that the item is called The Spearmarshall’s Gift, in case you were searching for “Elonian” instead.