- The Dark Magicians prompt window has reversed order of effects
In short, after the card’s effects are activated, it will first ask you if you want to set the card (instead of asking you if you want to draw it), then after you draw it it will ask you if you want to draw a card (instead of asking you if you want to set it.)
The effect works as it should, the error is in the reversed prompt text that appears in the activation confirmation window.