There description is very vague, it says they can be found on Atebus during certain times of the year... does anyone have more specific information about how I can find one?

Notes: Prize for Trivia ,

found here

so that means it'll probably come to the crystal shop in the future, but it's not all too expensive so your best bet would be just to buy it from another user

item descriptions, particularly for minions, are usually just lore and not indicative of how to actually obtain the item.