Three categories, vanity, weapons, and armor.
- Vanity (ghost, sparrow, ship) can drop from any chest you open, with chests from later levels having higher chances.
- Weapons (shotgun, sniper, SMG) only drop from the wave 7 boss. Three bosses have a specific drop, the remaining two can drop any of the three. Can farm them as much as you want in a given week.
- Armor drops from the chest that spawns after wave 7 which needs a charged key to open. These drops come in a specific order (class item, legs, arms, chest, head) and you won't see repeats till you have a full set.
https://www.reddit.com/r/DestinyTheG...eward_details/