Don't stuff words in my mouth Alice, I said in my first post that I'd have to speak up regardless of opinions on Arch and I meant it. The character doesn't fit the tone or theme, the doomrider is wearing powered armour which is worn by the space Marines (I'm not familiar with the exact chapter. The warp is chaotic space but the key word according to the codex is space. As in the black void. Having fun with a character rather than being serious is fine by me but this is a bit ridiculous. Doomrider is silly and in the description is noted as out classing a utter joke like snow flame (who in himself is a meme) it may be elf's call but I like the game so far and I actually have plans so damn right I'll speak up when someone tries to bring in a character like this.
Doomrider is depicted in Power Armor because, well, he's in 40k and was in the CSM codex before the Daemons codex ever existed for that game line. He supposedly would be granted such a thing by the Chaos Gods even after ascension anyway. For that matter Space Marines aren't aliens, and the Warp also exists in WHFB, and is described THE EXACT SAME FUCKING WAY as in 40k - Chaotic space. The emphasis in both cases is Chaotic, not space. The Warp is the Primordial Chaos, the source and seat of emotions and magic. It is the alpha and the omega, the beginning and the end of all things, the sea of birth and the site of death of the universe. The Warp is everywhere. I warned you not to get into this Lantz, you'll lose.
Besides CSM are not split into chapters, read more of your damn fluff. Chaos Space Marines don't go by the Codex Astartes.
Also, Doomrider having power armor, due to his being a daemon prince, means that power armor exists technically in WHFB. I pity the poor Brettonians that end up against him.
Work on your reading comprehension lantz, the Snowflame thing in the backstory WAS A FUCKING JOKE. It's hyperbole man, and even then Snowflame is a legit villain as well, remembered more for his campy appearence and powers than anything he actually did as a villain - he died in the issue which he appeared. The guy worshiped Cocaine as a god - seriously, look up the comic I'm not kidding. New Guardians was a weird weird series accidentally about Eugenics where the purpose of the team was rendered moot by the team structure.