Page 34 of the BRB says:
" troops that have charged that turn automatically
strike first"
- emphasis mine
Daemonic Gifts - Noxious Vapors says:
"All enemy models in base contact wth this Daemon lose the Always Strikes First rule (
if they have it) and always strike last."
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This right here is the reason why Noxious works the way we have been saying, and does indeed affect Charging troops.
First of all, I'll grant you that the FIRST part of Noxious Vapors' wording is clearly talking about "ACTUAL" Always Strikes First troopers...those that actually have the rule "ASF" - like High Elves, Keepers of Secrets, etc.
Now...look...there's no way you can argue the word-intent-meaning of the Gift for them...it CLEARLY says that if they had that rule...they lose it....AND...AND...AND...(that's a key word in this case)....
ALWAYS STRIKE LAST !
Unless you are being purposfully stubborn, there's little way you can argue that "Always Strike Last" is the same as "strikes last" - on page-54 of the Rulebook, which is specifically talking about Great Weapons and how they work in combat.
Going beyond that ASF model example, the key part of Noxious Vapors was the fact that they put that one section in - in parentheses - making it clear that "IF the model had ASF - then it would lose it as a result of the Gift" - - - BUT...the inverse can also be true - the model might NOT have ASF naturally, so they follow that up immediately with "AND......ALWAYS STRIKE LAST".
Meaning...even if the model doesn't have ASF (the special rule) - for WHATEVER reason it may be in base contact with the Daemon (charging, continued combat, etc) - it ALWAYS STRIKE(s) LAST".
There is no "except if it's Charging, then it can ignore this Gift" - wording that you seem to be looking for in there.
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One last thing to further reinforce the point. If you'll check out page 94 of the Rulebook, you'll actually see the the Always Strikes First special rule defined. The second paragraph is of interest here:
"Models with this special rule always strike first in close combat,
even before models that have charged that turn, and regardless of Initiative."
- emphasis mine
This is critical, Gyges, because it illustrates that, in GW's mind...Always Strikes First is SUPERIOR in "Speed / Turn Order" - etc - even to units that have Charged that same turn. So if Noxious Vapors clearly (literal wording) takes away Always Strikes First from a model, and forces that model to strike last (regardless of how it has gotten in combat, whether by Charging, etc)......then it's even more intuitive to think that the Vapors would work on "slower" troops that
don't have ASF as a special rule, and which have Charged in against the Nurgle model.
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You somehow believe, contrary to all our quoting from the books, and the past year+ of experience of gamers around the world - who have mentioned how the rule is played in their clubs, tourneys, etc- that when Noxious Vapors tells you that a model "in base contact with the Daemon......always strikes last"....that somehow there's a secret HIDDEN exception...which only you know about....that says "EXCEPT if the model got into base contact with the Daemon by Charging that round....then it gets to ignore completely the effects of the Gift".
Please, face reality. There is no such Exception.