I mean, at this point I don't mind going full murder mode on both Ella and Danica. Ella's goal, whatever it is, is gonna be evil or fuck over the protagonist, and she is completely fine with manipulating and murdering anyone in her way. And with Danica, I'm more surprised the MC simply wasn't more efficient in killing her. In fact, shapeshifting is such a versatile power that it's criminal how little he's doing with it. The first time I was impressed was with the Oscar ploy, but given that he caught Danica completely off-guard, she should've been dead instantly.
And on the subject of powers more generally, there are a few issues.
One, the MC really isn't doing a lot with his abilities. So far we have a version of mind-reading, spiky tentacles and body armor. Cool, but what happened to all those animal abilities he collected, like the jellyfish poison? Why doesn't he try shapeshifting into other people to absorb information ever? You could do so much more than just brute force, or at least tailor your style to different opponents, but nope.
And two, the power creep is nuts. It was kind of fine in the beginning, shapeshifting is a very strong power anyway, as is mind control (I generally despise mind control as a power, but that's a topic for another time). Then we get to the sword piercing the heavens, and you start to ask yourself how the fuck this never came up before in-universe. And then we get to Klaus throwing what appears to be plasma, that monster thing creating a miniature black hole, and Alice being able to nuke everything in a massive radius with a special move. And you start to ask yourself how much higher the power level will creep. Or, how they are in any way balanced. Like, being able to kill anyone by just looking at them for a few seconds, is on another level of broken powers (any normal person to be precise). With great power come either great limitations, or the writer having to explain why it doesn't insta-win everything. Better not to open that can of worms, unless you're going for the first option.