From Destinypedia, the Destiny wiki
Shadow Trespass is an Exotic version of the Eon Trespass jumpship designed by Elsie Bray, albeit advanced in age and decrepit in condition. Built during the Golden Age for war during a time of peace, it was designed with modified hulls tailored for stealth operations. It is available for Guardians to purchase from Eververse during Season 3 of Destiny 2. As the prototype of the ship was designed three years before Elsie's disappearance from all Golden Age records, it is possible this was the ship she managed to leave on - hence the stealth modifications.
From the journals of Beatrix Danai, Pilot
List of appearances