InterMission

Legendary | A small number of ultra-rare items in the game can only be found once within a given month's cycle. Each legendary item gives a large bonus of +7 to your team's score, but beware, as these items may be stolen. Happy hunting for these rare trinkets!

Here are all the legendaries found thus far; the longest of which took 4 months to first appear:

... plus (as of January 2019's release) there are more yet to be found ...

Tip 5 | When playing on a mobile device such as a phone or tablet, you can minimise the disadvantages by copying commands to your clipboard such as "!rob player" and then !invade before pasting and unleashing the pre-loaded attack on your target. This will close the time gap for enemy responses and you may even be able to perform your sting operation and escape unscathed.