Shield Brothers

Shield Brothers is a Strike in The Taken King. Your Guardian enters the Dreadnaught with the intent of finding and killing two Cabal brothers who are leading a strike team to detonate the Dreadnaught's core.

Plot
The Skyburner regiment of Cabal, based on Phobos, was commanded by the fearsome Primus Ta'aun, until Oryx, the Taken King, killed Ta'aun, presumably during the Taken assault on Phobos. Enraged, Ta'aun's two brothers, bound to him by 'the shield rite'--- Valus Thu'urn and Valus Mau'ual--- have boarded the Dreadnaught and are attempting to detonate its core, destroying the Dreadnaught with the Guardians on it.

Bosses
Valus Thu'urn

Valus Mau'ual

Source: Destiny Twitch Live Stream 8/19/2015 - Year Two