Envelope

A white envelope sealed with red wax is the entire promotion for an event: the Envelope was added in the October 10, 2026 patch as an invitation to The Candy Vault, scheduled for October 22, 2026. The wax seal carries the head of Creak, although the wiki suspects it is Sir Abe C. II, a character the letter teases who may be an alternate version of Creak. Glitching particles surround the item.

Using it

Using the Envelope opens it and reveals a golden letter inviting the player to a supper at Sir Abe C. II's estate. Using it again makes it vanish into a cloud of smoke and leave the inventory. Under the greeting, hidden text reads Dear Vessel, which suggests that Glitch wrote the letter.

Spawning

The wiki calls it a very rare limited-time item with a chance to spawn on every floor and subfloor, including visions such as The Rooms and Rush Mode. Seeds do not control it, so replaying the same seed may not produce the envelope again. It cannot be stored in a Briefcase or in the Rift, and a Depot scraps it for 1 Salvage Scrap.

First of its kind

It is the first limited-time item present in the base game.