I've searched for a definitive answer but couldn't find it to this question- assuming that retaliatory strike is triggered on a Kraken with hellwrought can the Kraken make the attack even though it can not move? As a followup does the attack have a 2" or 4" range?
tiberius is right. Hellwrought will work and allow the Kraken both to advance, but it can't, and to attack. It can still attack because the movement is not a prerequisite for attacking. Chain Strike only modifies the Kraken's melee range to 4" during its activation and Retaliation doesn't explicitly allow the model to activate, so Chain Strike does nothing.