Phase 9: crafted summons for the legendaries

Adrian, 2026-11-09: legendaries, mythicals, Ultra Beasts and Paradox Pokemon
come from crafted summons. 22 Sigils (Naganadel evolves from Poipole), one
item told apart by custom data, from world/summons.json through
tools/summons.py: late-game recipes in three tiers (Lv 70, 80, 90), each used
in a fitting zone. A summoned legend fights as a boss (area attacks by level
and type, arena 32, the Guardian's Ward) but can be caught; on capture it
loses every boss mark. One at a time within 96 blocks.

Quest book: a Legends chapter, one quest per Sigil (97 quests). JEI lists each
Sigil as its own item, and Island Drops says where a legend is summoned; drops
Cobblemon names but doesn't have (Ho-Oh's Sacred Ash) get no slot.

Self-tests every_implemented_pokemon_is_obtainable (spawn, fossil or Sigil for
every implemented species) and sigil_summons_a_catchable_legend. Self-tests
and the island check pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/quests.yaml

@@ -15,7 +15,8 @@
 #   checkmark: true                         the player ticks it
 # A task may also have a title. A chapter with `zone: <id>` starts with the quests of `zone_chapter`, where
 # {zone}, {low}, {high}, {hazard_text}, {guardian}, {guardian_level}, {drops} and {ore_names} come from the
-# zone's data; a template quest with `when:` is left out of zones that lack the thing named.
+# zone's data; a template quest with `when:` is left out of zones that lack the thing named. A chapter with
+# `summons: true` adds a quest per Sigil (world/summons.json), `columns: <n>` lays those out in a grid.
 
 book:
   title: Cobblemon Survival
@@ -260,6 +261,24 @@ chapters:
           - event: end_boss
             title: Beat Eternatus
 
+  - id: legends
+    title: Legends
+    subtitle: What never spawns on its own
+    icon: cobblesurvival:summon_sigil
+    summons: true
+    columns: 6
+    quests:
+      - id: about
+        title: Calling a Legend
+        icon: cobblesurvival:summon_sigil
+        size: 1.5
+        text: |
+          Legendary Pokémon don't spawn on their own. Each has a Sigil you can craft from late-game materials: look "Sigil" up in JEI. Using one in the zone written on it summons the Pokémon.
+          It fights like a guardian, area attacks and all, but this one can be caught. If it's knocked out, the Sigil is lost.
+        tasks:
+          - checkmark: true
+            title: Read this
+
   - id: machines
     title: Pokémon Machines
     subtitle: Five machines, each powered by a Pokémon inside it