Lambda Sash

Cannot be auctioned, traded, or bazaared, but can be delivered to a character on the same account.
Can be obtained as a random reward from the Gobbie Mystery Box Special Dial and similar sources.

Lambda (uppercase Λ, lowercase λ; Greek: Λάμβδα or Λάμδα, Lamda) is the 11th letter of the Greek alphabet. In the system of Greek numerals it has a value of 30. It was derived from the Phoenician letter Lamed Lamedh. Letters that arose from Lambda include the Roman L.