add magic item images, some wpm creatures

src/assets/fragments/weapons/warhammer-properties.md

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+### Warhammer Properties
+
+-   **Blunt**: No cutting edge, may be wielded by a cleric.
+-   **Versatile**: At start of combat round, if offhand is free, may choose to have hammer deal 1d8 base damage for that round while gaining the following properties:
+    -   **Slow**: Always attacks last in a round.
+    -   **Two-handed**: Requires two hands to use.