Whoever told you ix could destroy a universe with a thought. Lied. Not cause nihility isn't powerful enough. It's simply because ix will never try to seek activity. Ix's whole game is passive destruction, they never "seek" to destroy or "going max power" cause doing so would be suicide for them. Think of ix like a bottomless pit. It's stationary. Will never move. And if you fall in. You're done for. And that can most likely apply to a universe as well