That is Valkyrie Lucky Egg

You can get great deal item when open it.!
this the list item you can get from this box :
Valkyrie Shield 70%
Valkyrie Manteau 40%
Valkyrie Shoes 60%
Valkyrie Armor 40%
Variant Shoes 10%
Ice Pick[0] 50%
Ice Pick [1] 10%
50x Enriched Oridecon 5%
50x Enriched Elunium 5%
Fix get item :
1x Set Costume Rare/Special Grade (Account Bound)
1x Random Donated Headgear
1x Random Enrich Box