Script blocks for weather and talent experience, groves as ground; the co-op campaign brings rogues and a storm

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

docs/MISSION_SCRIPTING.md

@@ -58,10 +58,12 @@ creatures and heroes.
 | Units | Spawn | count, kind, level, side, where (the core, the trigger unit, a zone), optional name |
 | | Hero wave | count (sent at once) |
 | | Remove | side, zone (removes those units) |
-| World | Change ground | zone → floor, earth, rock, water, lava, gold (the core, portals, towers and the gate stay) |
+| World | Change ground | zone → floor, earth, rock, water, lava, gold, mushroom grove (the core, portals, towers and the gate stay) |
 | | Reveal | zone (lifts the fog of war) |
 | | Show | zone (moves the camera there) |
 | | Gold + / Mana + | amount (negative takes) |
+| | Weather above ground | fair, rain, fog or storm, for seconds (0: until a block changes it); it fades in softly. Only maps with land above ground have weather |
+| | Talent experience + | amount (experience for the player's master talents) |
 | Logic | If / else | condition; blocks inside |
 | | Repeat | times (0–100); blocks inside |
 | | Repeat until | condition, checked **before** each run (already true: the inside never runs); blocks inside |
@@ -80,7 +82,7 @@ Every number field holds a **value**; the switch in front of it changes the valu
   side/kind), *Count* in a zone, *Random* (whole number between a and b, deterministic),
   *Calculation* (`+ - * /`, division by 0 gives 0),
 - conditions (for *If*): *Comparison* (`< <= = != >= >`), *and*, *or*, *not*, *Yes/no*,
-  *Trigger unit is a* (kind).
+  *Trigger unit is a* (kind), *Weather above ground is* (fair, rain, fog, storm).
 
 Variables are numbers the mission remembers (saved with the game); a variable is known once some
 script of the mission sets it.