Yes, at the momment there is no in-game event.
(Because I heard that we can get those Purple Chest Key from event)
So now, how to get them ?
And anybody know all of prizes in the chest ?

I have a lot of these chest. After asking my friends, I knew the prizes are not so good. But is it still too hard to get keys ?

The Item Mall

Aries: Klayton

Kojika wrote:

They must be drunk since they are part liquor and I DON'T even want to know what the hard tissue is referring too so lets just say that's their bones, obviously. Since my mind may have been thinking of something else

"Laughter at the midnight hour, in our own little tower"

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USE GOOGLE OR THE SEARCH BUTTON FOR SIMPLE QUESTIONS

I remember the Easter event gave u eggs (to get u must kill lvl 10+ monsters only on Easter) there was a chance to give u different keys but never got any.

with the prize of purple chests , I think it's not bad.
So I agree it's not easy to get the keys. :)