add a magic item I wrote up, put under house rules

pages/13th-age/index.md

@@ -46,11 +46,12 @@ Other characters I've made for whatever reason:
 ## House Rules
 
 I don't consider myself much of a game designer, but nonetheless I have added
-some house rules to the game. I will try to catalog them here, just in the
+some house rules and items and so on to the game. I will try to catalog them here, just in the
 event I reuse them or they are useful to someone else.
 
 * [bss's Toughness](bss's-toughness)
 * [Influence Points](influence-points)
+* [Items](items)
 
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