Crates, Boxes & Keys

This family covers the sealed loot you open for a reward — booster boxes, mystery contraband and supply boxes, expander boxes, fund crates, and the keys that summon a boss or unlock a seasonal crate.

Most of them shower you with their contents on open; the rest are single-use keys that consume themselves to trigger something — a summon, a warp, or a crate. For how crates and keys fit into the wider drop economy, see Lootboxes & Crates and the Contraband system.