Nothing too terrible. But, for example, the novel very clearly states upfront that the only reason our MC gets literally eaten alive is because she drugged the ML (who had artificially cut off his emotional affect years before meeting her) with psychotics. It therefore makes no sense that she'd be worried about getting eaten in the novel. She simply has to avoid giving him drugs that make him insane. (He's also caustically rational, so even if he discovered eating her could perfect his powers, he's the type to try it out first by eating an arm, as a just in case)

I avoid drugging people every day, it's not that hard.

The comic leaves it more open, implying the ML had gone too long without the cleansing effects of a Purifier, and consumed her in an accidental frenzy. Also introducing the frisson of danger that all wizards are a lick of blood of way from losing control with her and cannibalizing their one salvation, makes things more interesting and perilous for our MC.

I'm also not digging the undercurrent of sl*t shaming in the novel, which is reduced/ absent in the comic.

In the original storyline, with zero hope and no knowledge of an end date to their absolutely crushing, endless poverty, the MC had made the selfless choice of secretly selling herself as a prostitute after all other options were exhausted, in order to continue supporting her young siblings after the vatican upped her required payments on their parent's debts to unreachable amounts. She planned to sell herself until they were old enough to survive on their own, then send them away and kill herself to take the debt with her. It feels cheap and icky for the MC to call her original self "evil" for burning down the brothel were she worked, or hunting down the scum who had bought and used her once the tides of her fate changed. They deserved it, and more power to her.

The novel also heavily implies that the reason why the ML didn't like her in the original was because she was promiscuous, and that the facts that she must be shared across all of the wizards (seeing as she is the only Purifier alive, and they'll go insane without her) makes her a bit skanky. Thankfully, that undercurrent is removed/ toned down in the comic version.

Like, really obvious names with too many Z's, X's, or K's. Our carnivorous ML is "Zahid Karnor". The antagonist's name is Zenosius. There's ranks of shadow soldiers. Loyal butlers. Psycho, hyper-powered bosses. Broody leading men every high-ranking woman wants to bang. An elaborate religious mythicism origin story. Lot's of good stuff.

Ertha prostituted herself to pay off her family's debt who was only able to retire when her younger sibling's powers awaken at 15 becoming the Fire and Wind Wizard. She becomes a minor vengeful antagonist first enacting revenge on her former boss and clients and then just getting a big head and taking advantage of those around her. Then she drugs the ML (because he's hot) unknowing that he was also a wizard and she was the purifier. So in a drugged madness he literally eats her alive.

In this world there are the 4 wizards (4 elements), holy powers, and the purifier. Every generation there are 4 wizards and one purifier. Wizards need a purifier to prevent corruption from magic but they also have a drug effect. Think morphine addiction. This setup was just the book's way to keep up a conflict between wizards. Wizards need to have some contact to feel its effects, the deeper the better. That's why Zahid eating her in the book was a plus for he completely absorbed Ertha's powers, and that's why she is still scared of him in the story.

"While I received a small bit of comfort from the intertwined hands, I did not lean on the warmth emitting from it.

I knew how useless that warmth would be"