1.How many types of keys and boxes are there?

2.Are any keys multi use?

3.Can the cheap bns gold same key used on multiple types of boxes?

4.Where are keys available?

Keys: There are only 3 types of keys and once you use them they disappear

1. Key - Gives you a random weapon from a weapon box, and opens dungeon chests (Obtainable: Quest rewards, drops, those green/red/blue boxes you get from quests/dungeon quests, buy bladeandsoul gold and the blacksmith profession)

2. Hongmoon Key - The same as a key except its not tradable and can't open physical dungeon chests(Obtainable: Mainly surveys/events/daily dash (i think the DD rewards are HM keys not keys)

3. Brilliant/Shining keys - I forget which one they're called on this version, but these only open weapon chests and 100% guarantee to give you your classes weapon, not a random weapon (Obtainable: Random chance from those green/red/blue reward boxes, Cash Shop, Premium members can buy for valor stones at the dragon express)

Boxes: There are just two types of boxes that we have that require keys

1. Weapon Box - A box containing a weapon depending on the type of box (Ex: a "Locked Seashell Weapon Chest" with the words written in the color blue, will give you a "Seashell xxxx Weapon" that is color blue, I'm just referring to the rarity color) (Obtainable: Essence wheels with the essences from field bosses, quests, dungeon drops)

2. Dungeon Chest - These are the physical brown wooden chests at the end of dungeons with a shining light beam on them that can be opened (not the box that drops after a boss), they require a regular key to open (edit: hongmoon keys don't work, and brilliant/shining keys dont work for sure and you wouldn't want to use them)