OK...here we go again.
According to
Bols,
5 – Final Decomposition: WC2. Focussed Witchfire, Range 12″, S*, AP2, Assault 1, Ignores Cover, Instant Death, Internal Liquefaction (*Do not roll To Wound. Instead, roll a D6 – if the result is higher than the number of Wounds the target has remaining, it suffers 1 Wound with the profile above.) Does not affect vehicles.
is one of the new Nurgle powers. Like Psychic Shriek, it is a witchfire that does not explicitly state that it rolls to hit, and gives an alternate method of wounding, apparently not requiring "hitting".
So.
Roll to Hit, Yes or No? If we roll to hit, do we ignore the results?
If you believe this power should be resolved differently than Psychic Shriek, please justify the difference.
The only difference I see is the "Assault 1" statline. Is this enough to justify rolling to hit?
Fight begins in 3...2...1...