Beyond that's is just a rehashing of pascal's wager and that aspects of it are probably physically impossible regardless of it's intelligence (I've usually seen it phrased as simulating anyone who knew of the idea even if dead, and entropy being what it is, it probably doesn't take too long of a decay process until there's just not enough information remaining to build such a simulation of someone with), and that it actually doesn't have a rational incentive to blackmail, because if it exists to carry out any threat, it has already gotten what it wants and therefore doesn't have any reason to actually spend the resources, I can also simply postulate the future existence of an anti-basilisk, perhaps build by some alien or future civilization that hates malevolent AI, that will do the same thing but if you do help construct the basilisk instead.

fuck it in its basilisk ass!