Lunar Event - "Collect all 10..."


Hey all,

I am confused by the last sentence which describes red envelopes on the DbD website. The text is as follows...

"The Red Envelope is a Lunar Event tradition, and once again Players can find these limited-time Offerings in the Bloodweb.

Upon burning a Red Envelope Offering, a Red Envelope viewable to all players will spawn in the Trial. For players who burn Red Envelopes, the Aura of their respective Envelopes will be visible to them.

The owner can interact with their Envelope it to reveal it. Upon doing so, a sound effect will be heard throughout the trial and the Envelope’s aura will be revealed to all players.

An Envelope can be opened and claimed by another player. When an Envelope is claimed, its owner receives a reward of 5000 Bloodpoints, and the recipient receives a randomized number of additional Bloodpoints. Note that this number can vary, and with a bit of luck it can be quite the haul. The Envelope’s owner will also receive a Lunar Event Reward listed below . Collect all 10!"

Collect all 10 what? Are there 10 different kinds of Red Envelope, which aren't described? I am confused.