Event thoughts and notes:
-It's a 28 day event, so if you do 6 mans every day + the event dungeon, you can upgrade 2 of your Sky-Blue Chest 1s into Chest 2s. Opening those 2 plus the left over Chest 1 gives you 20 Blue Hearts a day, or 560 for the entire event.
-The prizes available are okay, but I wish the Aquamarine was a Eminent Selection Chest instead. Still not bad though. At 224 Blue Hearts it is the most expensive single item of the event.
-Den resets are only useful to the most powerful of players. 12 Blue Hearts feels okay of a price for this.
-100 Combustion Stones isn't too bad for 16 Blue Hearts, though if getting other stuff hitting the Character Limit of 20 purchases may not be possible.
-The Brilliant Vesper Stone is a huge purchase for some players. It may be worth every single one of those 112 Blue Hearts for it.
-200 Vesper Stone Crystals for 16 Blue Hearts could be very useful depending on progression. No limit also is nice, but if getting the gem and the brilliant stone, plus possibly other prizes you will have very little hearts left over.
-Phantom Flower has not been seen in a long time. I like it, but fashion is subjective. 32 hearts for the outfit, but oddly enough its head adornment is 80.
-I believe Cyber Noir is a new outfit. I like it too, but again fashion is subjective. 32 hearts for the outfit and another 32 for the hat, but again the adornment for it, the Cloak is 80 hearts.