Design changes to the new model may even stop the rules arguments associated with Warhammer 40,000’s iconic one-way transport ...

The armor itself isn't heretical, but if you see someone on the battlefield wearing Mk. 5 Power Armor, it's never a good sign ...

Finally, there's also a sheet of Sons of Horus and Imperial Fists transfers, plastic blast templates ... if you just really love Space Marines, then yes, The Horus Heresy is for you.