Event Period
From Wednesday July 15 (After maintenance) until Wednesday July 22 (Before maintenance).

Event 1
Do 1 of the following daily quest everyday and you will get 1 Frozen Stinger for each completed quest on Friday July 24. Daily quest resets everyday at 6AM JST.

For the past couple of days NCSOFT JP have been hinting about their next update of Hell Island with multiple screenshots on their official twitter account along with announcement of their Live stream on Saturday July 18 from 8 to 9 PM JST. 

Hell Island is a new GvG area with a mix of PvP and PvE where guild members who have reached at least level 50 and have a certain amount of Spirit Points can teleport to the new area to kill various various Demons Bosses and mobs to acquire various type of loots which are still to be confirmed as it may differ to either the Chinese or Korean server.

It has come to my attention that there is a lot of misinformation going around the web concerning Blade & Soul system requirements and performance, thus I have decided to make a couple of videos of different scenarios to show the in game performance on my own PC which is a fairly high end system.

Blade & Soul was developed on modified version of Unreal Engine 3 which at the time of development was a powerful game engine. Though the game performance fall short when it comes to scaling with newer hardware for better game play performance. 

User ジャッカル桑田, on the official Japanese Blade & Soul bulletin board, has reported his statistics after opening 232 Moonlight Boxes which are currently available on sales in the Dragon Shop (F2) for 1,400 Dragon Balls each. The statistics below is just from his own experience will only a small sample size but it can be a good indication of what you could expect if you thinking of blowing up some real money to try the RNG luck.

232 x Moonlight Boxes
Hongmun Clan Hexagonal Amethyst x3 (1.2%)
Hongmun Clan Hexagonal Aquamarine x2 (0.8%)
Starlight Boxes x48 (20.6%)
10 Starlight Boxes x0 (0%)

(Note: Only Gems and Starlight Boxes were counted)

48 x Starlight Boxes
Stack of 100 Spirit Stones x11 (22%)
Moonwater Plains Evolve Stone x9 (18.7%)
Silverfrost Evolve Stone x3 (6.2%)
Stack of 10 Medal of Honor x5 (10.4%)
Soul Stone Bag x4 (8.3%)
Sealed Demon Urn x1 (2%)
Origin of Earth x0 (0%)
Five Direction Spirit Tile x1 (2%)
Glowing Hexagonal Topaz x2 (4.1%)
Glowing Hexagonal Diamond x2 (4.1%)
Dragon Spring Weapon Box x0 (0%)
Dragon Protection Stone x1 (2%)
Others (~20%)

(Note: Soul stone were excluded as the user forgot to count them)

As a conclusion this is just a indication of the probability of the RNG from a small sample number, but  ジャッカル桑田 believe that may have a better probability if you open more boxes. Can you beat the RNG or the RNG will always beat you?

Source