EastScape Wikibuilt from the game itself
A Wish
“Make it: for 30 minutes, rare drops come 5% more often. Another adds 30 minutes more (up to 2 hours). From the Star Tent, 3 a week. Bound: it can't be traded, sold or dropped.”
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The Star Tent, in Cloudreach: 100 Star Fragments. World events.
Can't be traded. Your a wish can't change hands.