Regarding the Easter event...
Firstly there is a bug with the bunny from treasure. So there is a maintainence but it was delayed but 2 hours. So the GMs decide to max enhance all the rabbits we receive. (From event not trade)
Ok, what i mention above is fix. (please read their notes at home page, press home at the top middle of your screen.)
Secondly, now there is a second bug. Where you cant sized event treasure from others. (the treasure with a plus in the name).
Thirdly, you can get rabbits from other player via trading.
Lastly, the highest stage you can make by yourself (the rabbits) is 3rd stage. There is 6 types of treasure you can collect in the event. First three event treasure is stage one rabbit of each realm. While the second three is stage two rabbit of each realm.