rules updates

add dread wurm and werebeasts
fix backlink for magic items
update rules for + abilities

src/pages/magic-items/feathers-of-ferrnym/boat-feather.md

@@ -0,0 +1,21 @@
+---
+title: Feather of the Boat
+description: A magical feather that can conjure an elegant boat.
+date_pub: 2024-03-17T21:37:13.000-04:00
+section: magic items
+content_type: feature
+short_code: mff0
+---
+
+A small, magical feather that conjures an elegant, bird-shaped boat when tossed into the air.
+
+-   Feather disappears with use.
+
+### Boat
+
+The boat:
+
+-   Remains for up to 24 hours.
+-   Moves 80' / round in the water
+-   Can hold up to 32 people.
+-   Has AC 12 and (3d6+6) x 10 HP.