How do I kill a wizard?

*Mirabel: I have been charged with the most noble quest in the land. A wizard has appeared who has resisted death in every form. The greatest warriors have fallen before him, the strongest poisons have not affected him, he has been thrown into volcanoes, gone on the front of charging horses, and been placed at the bottom of the ocean yet he still lives. I was chosen because I am the greatest wizard of all time, destined to defeat my greatest foe yet he's not too difficult so far seeing as he's just standing there doing nothing-*<br><br>*Stranger: You're the great wizard here to defeat me?*<br><br>*M: Yes, you fiend! I shall defeat you and save this world from your darkness and evil! So come on! Cast your strongest spell before I run you through!*<br><br>*S: I'm not a wizard and I don't have any magic.*<br><br>*M: What? But then how are you still alive? I was told you were a powerful wizard who was impervious to death.*<br><br>*S: I'm not. You people just suck at killing people.*<br><br>*M: But all these people I've spoken too tried! They said you laughed in their faces as you burned, resisted poison, broke free from chains, and overall just shrugged off everything that was thrown at you! How! How do you do it all?*<br><br>*S: I'm also an immortal wizard hunter. Why do you think I've been letting all these people who have tried to kill me go? You look like the only promising one yet so I'm going to ask you one more time; how do you plan on killing me?*