Legendary transformation contract bundle

Hi. I noticed several people use several transformations already. Someone told me that you have to join 'pvp all' event, get to rank 1, and receive a legendary transformation box. I have joined that event a few times and noticed I have about 6 of the boxes in my inventory. Problem is, I can't open it. Is there a secret process to open this box? I tried double clicking it, or right clicking it, but it says "unable to use". I'm flustered. I saw someone already using a Mastarius transform, and I can't even get a decent legendary one. Please help.

 

You obtain as reward "Transformation Contract Box" by winning 1st place in "PvP All" event. "Legendary Transformation Contract Bundle" can't be opened for now.
P.S: you can receive all types of transformations.

 

So hard to go 1st place in PVP all event as a mage. You are the first to get ganged upon by warriors.

 

Ye, dmg is still broken AF...doesn't matter crit rate is 95-100%. No way you deal 6-7k dmg critted without buffs and just 1.5k-2k more full buffed over 50k hp.

 

Yeah, that's what I have observed. I get damage at a staggering 4 to 7k per hit...ouch! Even with 40k plus HP, that is a quick 5 to 6 landed skills. Warrior attack speed is also a lot quicker than mage attack speed. I just hope they tweak it more to balance the game a little bit better.