Twitter owner and billionaire entrepreneur Elon Musk and author Stephen King have been duking it out over the blue-check verification badges since Musk first announced his plan to charge a monthly fee — and King attempted to escalate matters on Saturday.

The acclaimed horror author — who remains verified despite his repeated claims that he has not paid the requisite fee — responded to Musk’s implication that he was footing the bill personally by suggesting he do something else with his money.

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“I think Mr. Musk should give my blue check to charity. I recommend the Prytula Foundation, which provides lifesaving services in Ukraine. It’s only $8, so perhaps Mr. Musk could add a bit more,” he tweeted.

Read more: Daily Wire