'Crossbearers' legion battle brother (Warhammer 40k fanart)

Art of my homebrew chapter, Crossbearers.
Of unknown founding and origin, they are on a perpetual crusade in the Eye of Terror with the mission of making as many heretics as possible repent their sins against the Emperor of Mankind and administer them the 'Emperors Peace'. They believe when enough sinners have been absolved, only then will the Emperor come truly back to life.