History of Control Group

Control Group is a Deep Stone Crypt raid triumph: complete all raid encounters with a fireteam made entirely of one Guardian class.

How to complete

1. Gather a full fireteam of six who all play the same class: all Hunter, all Titan or all Warlock.
2. Clear the encounters: Crypt security, Atraks-1, Descent and Taniks, the Abomination. TheGamer says the class only needs to match when each encounter is completed, so you can swap between encounters.
3. Finish the whole raid in a single run.

Seal and rewards

Part of the Descendant seal. A search summary also says it raises the initial Eyes of Tomorrow drop rate; I did not find this in an opened source. TheGamer says Eyes has a 10% drop chance from Taniks, first clear per character per week.

Notes

The sources are from the Beyond Light era and may be outdated.