What is this in CBJP?

tell pe plz what is this...

and this...

The first one seems to be a tune up item, for "cleaning" a used slot.

The second one is a "goal" cube. You must do something in order to open it. I've no clue about this one, I just know there is one kind for boss quest (you must do one of them 2 or 8 times), and another one for mission quest (just do missions to grabs points for this cube). Anyway for the second I'll let those who open goal cubes alot.

Ko-Rea wrote:

tell pe plz what is this...

I needed help with this one too, it's Cosmo Regret Alpha, it clears a used or broken slot from an item. Damn useful.

Ko-Rea wrote:

and this...

Challenge Cube. For that particular one, use it then participate in Union Wars (Shuffle or Union battle in the Arena, that is) 30 times within the next 30 days for it to unlock and give you a random head accessory (some of which are very rare).

so should i use it or it will be best don't use it?

Use the cube if you pvp a lot

First picture is basically a Tune remover. It removes tunes on parts. (It does not remove broken tunes)

Next one is a Challenge Cube - To use:
1. Double Click it in your items menu
2. Complete the challenge (A1 is arena 30 times regardless of win or lose)
3. Open box to receive headgear