The Vanguard Mentor Missive was an exotic item in Destiny that could be taken to Xander 99-40 to be exchanged for an Exotic Weapon Bounty. It could be received as a random reward when turning in bounties after reaching level 20, but was made unobtainable in Year 2 with the release of The Taken King. The Year 1 versions of these weapons can now only be obtained from Legacy Engrams.
When taken to Xander 99-40, the Guardian could choose one of three randomly-selected Exotic Weapon Bounties. There were five possible bounties:
- Toland's Legacy, which rewarded a Guardian with the pulse rifle Bad Juju.
- Shattered Memory Fragment, which rewarded a Guardian with the fusion rifle Pocket Infinity.
- A Light in the Dark, which rewarded a Guardian with the hand cannon Thorn.
- A Voice in the Wilderness, which rewarded a Guardian with the machine gun Super Good Advice.
- A Dubious Task, which rewarded a Guardian with the shotgun Invective.