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/balance.md

@@ -54,6 +54,7 @@ Every tunable lives in a config file or in this table. **Placeholder** means gue
 | Regenerators breakable by players | no; explosions don't hurt veins | Fine for now (Adrian, 2026-10-30) | `tools/zone_ores.py` → `global.json` | Otherwise a player could remove a vein for good |
 | Respawn block (regenerator) | the player's aim passes through it unless sneaking, so ore behind it can be mined; no collision (the mod's own); glass about 9 % opaque with a 27 % edge (was stained glass, about 50 %) | Adrian, 2026-11-09 | `mod/src/main/java/.../RegeneratorBlockMixin.java`; `pack/kubejs/assets/regenerating_ore_veins/` | Sneak-use still shows its info |
 | Homeless lines | 31 lines with no matching biome on the island: rare bucket, weight 10, at the zone's levels, anywhere in the zone | Placeholder (Adrian, 2026-11-09: rare, in fitting zones) | `world/zones.json` → `homeless` → `tools/zone_spawns.py` | Which zone each lives in is listed there and in `docs/zone-species.md` |
+| Legend summons | 22 Sigils; tier 1 Lv 70: 4 zone material, 4 diamonds, netherite ingot; tier 2 Lv 80: 4 material, 4 diamonds, nether star; tier 3 Lv 90 (Rayquaza, Mewtwo, Eternatus): 4 material, 4 netherite ingots, nether star; one at a time within 96 blocks; fight as a boss with the Guardian's Ward, arena 32 | Placeholder (Adrian, 2026-11-09: crafted summons) | `world/summons.json` → `tools/summons.py`, `tools/zone_bosses.py` (`SUMMON_ARENA`) | Nether stars come from the Sacrifice Altar at Lv 100 |
 | Vein Locator | compass + copper ingot; 75 % chance to break per use (the mod's default) | Fine for now (Adrian, 2026-10-30) | `tools/zone_ores.py` → `vein_locator.json` | The mod's default recipe needs netherite |
 | Drops for mobs the island lacks | Blaze Rod: Carkol 10 %, Torkoal 25 % ×1–2; Ghast Tear: Drifloon 5 %, Dusclops 10 %; Breeze Rod: Whimsicott 10 %; Shulker Shell: Shuckle 10 %, Cloyster 10 %; Nether Star: Charizard 5 % | Fine for now (Adrian, 2026-10-30) | `datapacks/core/data/cobblesurvival/species_additions/` | Every drop and what consumes it: `docs/pokemon-drops.md` (`tools/drop_audit.py`) |
 | Cobblebase skill gates | start: gatherer, harvester, irrigator, producer, furnace fuel, water fill, extinguisher, scout, guard; Button Isle: fishing, forager, botanist, collector, snow fill, brewing fuel, craftsman; Southwold: pharmacist, scholar, mentor (passive XP), lava fill; Westmarch: mining, excavator, architect, armorer, diving; Verdant Jungle: alchemist, trainer, smith, prospector, growth aura; Highland Meadows: speed, jump, haste, night vision, water breathing, saturation buffs; Mangrove Mire: resistance, strength buffs; Sunscorch: friend recruiter, aura boost; Frostpeak: healer, lucky charm; Deep Dark: breeder, egg hatcher | Placeholder | `datapacks/core/data/cobblesurvival/progression_gates/base.json` → `cobblebase_skills` | A zone means its soft gate, checked on the pastured Pokémon (see "Soft gate levels and materials") |