When the wizard’s time was up, Death knew that he’d have to get creative.
Magic users had all kinds of cunning little ways to avoid their fated ends. Some used prophecy to avoid injury. Others pulled their lifeforces out and tucked them into safe places. Others made spectral weapons to fight him. He got them all, eventually.
Death opted for the direct approach, appearing in the wizard’s scrying glass while he was in the middle of a delicate alchemical procedure. He dropped the glass in surprise, immolating himself.
It was messier than Death liked, but a win was a win.