That looks great.
Names, names,
"No Saving Throw" comes to mind first hehehe.
Cracking open my Latin Dictionary, I have a few ideas.
praesidio -to guard, protect, defend; to command, be in command of.
praeval-ens/entis - exceptionally strong, exceptionally powerful
preti-os/us - precious, valuable; expensive; extravagant
pugn-ax/acis - Pugnacious, scrappy, aggressive; quarrelsome; dogged
gladi-us/i - Sword; murder, death
jus or
potestas gladii - right to try and punish a capital crime (granted
by emperor to provincial governors) ((Bolded a very nifty part consideringthe 40k setting))