[Event] Rainbow Flondor Goose Egg

- Description: A goose egg painted with rainbow colors. Right-click to obtain all of the following. [Event] Rare Courser Training Box x1, [Event] Extra Mount EXP Scroll(10 Hours) x1, Celerity Draught x3, [Event] Mystical Brilliant Egg x1

- Additional use requirements are not yet decoded; this is not a complete eligibility check.