1. Giant Size X-Men #1 & Uncanny X-Men #145: Her first appearance, and the first time she's introduced with her first name respectively.
2. Uncanny X-Men #160: This when she is kidnapped by Belasco.
3. Storm and Illyana: Magik: This four issue limited series chronicles Magiks seven years in Limbo. Note that the title on each cover is Storm and Illyana: Magik, but is also known as Magik: Illyana and Storm.
4. Uncanny X-Men #303: She dies of the Legacy Virus
5. New X-Men #38-41: Magik is shown to be ressurected by Belasco