Name: Penitent Knights
Chapter Derived From: All of them, sort of...
Advantages: Cleanse & Purify
Disadvantages: Death Before Dishonour
Fluff:Too much to entirely post here (anyway its in the fluff section), but basically they are 'penal' marines of sorts who are no longer truly members of the Adeptus Astartes (they have the physical abilities but few of the 'rewards') and have taken an oath of never ending war.
Colours: Glossy Black Armour & Silver Helmet
Left Arm and Shoulder pad in original Chapter colours.
Right Shoulder pad differs depending on squad type e.g. Impero Praetorians is Gold. The Shoulder Pads trim is always silver except in very special exceptions.
Heraldry: Skull and Tear in a myriad of combinations (my mates designing it for me and thats the only direction I gave him so I dont even know what its going to look like
)- only used on banners and vehicles, or can be used a battle badge by anyone who has contributed a marine to the Knights.
Battlecry: "For The Emperor!" (squad commander) "For Redemption!" (squad)