Remorseless - Immune to Fear, auto-pass pinning checks
Sons of Barbarus - Re-roll failed Dangerous terrain for swamp, mud, and toxic sludge
Intractable - When making sweeping advance moves you -1 to distance
Chem Munitions - Any flame based weapon can upgrade to this at no points cost, they gain shred and gets hot!
All flame based weapons within the squad (or on the vehicle) upgrade to this if you take it
Power Scythes may be taken at the same points cost as a Power Fist, and be given to anyone who can normally take a Power Fist.
They have no restrictions other than not being able to take the other Legion specific units.