
All space marines are technically immortal. Eliphas is a member of the most organised and second most powerful legion he could have been a later recruit or a founding member, Chaos marines are technically immortal because constantly being in the warp has weird effects on both time and the person involved.
Not Again! when the Daemon Prince gives him the gears for losing? He was in the Basilica of Torment for losing at the Siege if Terra as well.
Eliphas: He was chilling in the Eye of Terror with the rest of the Word Bearers. Flayed ones: Because a killer robot with bloody claws wearing the skin of someone you know is going to shake you up, no matter who you are. It could also be a Cultural Translation if we assume the Tau have a similar phrase (perhaps "in front of their nasal slits"). The sentence "We (noseless Tau) will steal right from under their (nose-having aliens) noses" therefore makes sense. The Tau are fighting every other faction in the galaxy, who have noses. Besides, doesn't Commander Farsight have a sword on his battlesuit? Melee weapons would have been easier to make and use, and since most ranged weapons before guns also rely on physical strength for their range and power, those wouldn't be much more effective. They weren't always using those pulse rifles. That may be true of our culture, but is it true of theirs?. The Stealthsuit pilots could have picked it up from humans who joined the Tau Empire, and a sword is a pretty common symbol of precision, speed and lethality, which would fit the Tau's usual tactics and strategy. Isn't the Stealthsuit phrase, "We will steal it right from under their noses!" a strange one to come from a species that has no nose? Why do the Flayed Ones damage the morale of the Dark Eldar units when surely they've seen it all before? Why did the Tau give their Soulstorm base the romantic name of 'Sword Moon' when they avoid melee combat like rape? What the hell was Eliphas the Inheritor doing for 10,000 years prior to the Dark Crusade? Shouldn't he either be dead or a Daemon Prince by now?.