(TL;DR at the bottom of the post)

AD and AP play a really interesting role in League of Legends. AD corresponds heavily to physical damage and AP corresponds with magic damage; however, this rule is not hard-and-fast ( Corki deals a lot of magic damage scaling off AD, for example, and Ezreal's Mystic Shot deals physical damage scaling with 40% AP). Also, while physical damage usually comes from physical sources-- hacking blades, crushing blows, etc.-- sometimes these sources deal magic damage ( Malphite is a rock-man who punches people with his fists, and deals mostly magic...
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