It’s a level-up an alt event basically (assuming this is the event you meant) - make a new character get to a certain level to open a chest, and then do it again, after getting to the 350 reward bundle you can get a ‘Jump Package Voucher’ that will let you make a Lv. 300 character later on once the event has ended.
As you can see in the cropped image above, there’s the rewards the jump package inside.
( The rewards will be sent to player’s message box, so don’t worry about its use for now)
Rewards:
- Lv 270 Primus Weapon & Armor Chest (30Days)
- Rank 2 - 8 Class Cards
- Character Lv 300 Card
- 5,000 Attribute Pts
- Klai/Orsha/Fedimian Warp Scrolls
Hopefully that explains it a little. 
Thanks ! i put in the missing words.
