Chainbreaker: rare, very strong original creature (twin-axe cleave, restless without fights)

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

DESIGN.md

@@ -78,6 +78,11 @@ An original dungeon management game (genre: dungeon building & defence) that run
 - **Torture chamber**: one prisoner per 2 tiles. Defeated heroes are knocked out (if there is room) and carried in by imps; torture drains their HP over ~100 s, ~40% defect (paladins ~25%) and become own creatures (needs, wage, lair). Attracts the **Jailer** (6+ tiles): tanky melee that pulls enemies in with a chain
 - **Temple**: creatures pray for mana (more than studying) and mood. Attracts the **Flame Priestess** (6+ tiles): fireballs with splash damage, heals creatures, heals the Soul Core (~8 HP/s) when it is below 90% and no fight is nearby
 
+## Chainbreaker (rare creature)
+- Original design: massive obsidian demon with glowing cracks, broken chains and twin axes; very strong (600 HP, 36 attack), its axes also hit a second enemy nearby
+- Comes through the portal only rarely, and only to great dungeons: 40+ room tiles, a creature of level 5+, 4000+ gold; only one at a time
+- Restless: after two minutes without a fight its mood sinks
+
 ## Hero wave AI
 - Each wave picks an **entry point** on the border of the realm facing the hero gate: few towers/creatures, no reinforced walls and a short way are attractive, entry points of recent waves are avoided, plus some randomness
 - Waves of **6+ heroes split into two groups** with different entry points (the paladin goes with the bigger group)

lang/de.lang

@@ -340,3 +340,6 @@ set.render_scale = 3D-Auflösung
 
 hint.pickup_prisoner_where = Gefangene können nur auf eigenem Gebiet aufgehoben werden.
 hint.punch_where = Die Hand kann Helden nur auf eigenem Gebiet schlagen.
+
+unit.chainbreaker = Kettenbrecher
+hint.chainbreaker_restless = Der Kettenbrecher wird unruhig: Er will kämpfen!

lang/en.lang

@@ -341,3 +341,6 @@ set.render_scale = 3D resolution
 
 hint.pickup_prisoner_where = Prisoners can only be picked up on your own territory.
 hint.punch_where = The hand can only punch heroes on your own territory.
+
+unit.chainbreaker = Chainbreaker
+hint.chainbreaker_restless = The Chainbreaker is restless: it wants something to fight!

src/game.rs

@@ -94,6 +94,7 @@ pub enum EK {
     Paladin,
     Jailer,    // attracted by the torture chamber
     Priestess, // attracted by the temple
+    Chainbreaker, // rare and very strong
 }
 
 pub struct St {
@@ -123,6 +124,7 @@ pub fn st(k: EK) -> St {
         EK::Paladin => s("unit.paladin", 700.0, 26.0, 1.0, 1.7, 1.2, 220, 1000),
         EK::Jailer => s("unit.jailer", 260.0, 16.0, 1.0, 1.6, 1.3, 140, 0),
         EK::Priestess => s("unit.priestess", 70.0, 14.0, 5.0, 2.0, 1.6, 120, 0),
+        EK::Chainbreaker => s("unit.chainbreaker", 600.0, 36.0, 1.1, 2.3, 1.1, 400, 0),
     }
 }
 
@@ -720,6 +722,13 @@ impl Game {
         if self.counts[6] >= 6 {
             opts.push((EK::Priestess, 2));
         }
+        // the Chainbreaker only visits big dungeons with experienced creatures and a rich treasury
+        let room_tiles: usize = self.counts.iter().sum();
+        let veteran = self.ents.iter().any(|e| e.alive && e.creature() && e.level >= 5);
+        let has_one = self.ents.iter().any(|e| e.alive && e.kind == EK::Chainbreaker && !e.hero);
+        if room_tiles >= 40 && veteran && self.gold >= 4000.0 && !has_one {
+            opts.push((EK::Chainbreaker, 1));
+        }
         let total: u32 = opts.iter().map(|o| o.1).sum();
         let mut r = self.rng.next() % total;
         let mut kind = EK::Kobold;
@@ -1160,6 +1169,25 @@ impl Game {
             self.sfx(Sfx::MeleeHit, tx, ty);
         }
         e.xp += dmg * 0.6;
+        if e.kind == EK::Chainbreaker {
+            // twin axes: a second enemy next to the Chainbreaker takes half damage
+            let side = !e.hero;
+            let second = self
+                .ents
+                .iter()
+                .enumerate()
+                .find(|(o, x)| *o != j && x.alive && !x.held && x.hero == side && x.captive == 0 && (x.x - e.x).powi(2) + (x.y - e.y).powi(2) < 2.6)
+                .map(|(o, _)| o);
+            if let Some(o) = second {
+                let (ox, oy) = (self.ents[o].x, self.ents[o].y);
+                self.fx(2, ox, oy - 0.2, 0.0, 0.0, 0.25, 0xff40a0ff);
+                self.ents[o].hp -= dmg * 0.5;
+                self.ents[o].flash = 0.15;
+                if self.ents[o].hp <= 0.0 {
+                    self.kill(o);
+                }
+            }
+        }
         if e.kind == EK::Priestess {
             // fireball: half damage to enemies around the target
             self.fx(3, tx, ty, 0.0, 0.0, 0.5, 0xff3080ff);
@@ -1617,6 +1645,15 @@ impl Game {
                 }
             }
         }
+        if e.kind == EK::Chainbreaker {
+            // restless: without a fight for two minutes its mood sinks (skill_cd counts down as idle time)
+            if matches!(e.job, Job::Attack(_)) {
+                e.skill_cd = 0.0;
+            } else if e.skill_cd < -120.0 {
+                e.happy -= 0.005 * dt;
+                self.hint(20, "hint.chainbreaker_restless");
+            }
+        }
         if let Job::Attack(id) = e.job {
             if !self.attack_job(e, id, dt) {
                 e.job = Job::None;
@@ -3270,5 +3307,44 @@ mod tests {
         assert!(g.pickup(Some(imp)));
         assert!(!g.drop(40.5, 40.5) || g.map.t[idx(40, 40)].owner == Owner::Player);
     }
+
+    #[test]
+    fn chainbreaker_visits_only_great_dungeons() {
+        let mut g = Game::new(8, 64, 64);
+        g.gold = 9000.0;
+        // conditions not met: no Chainbreaker among many portal visits
+        let (px, py) = g.map.portals[0];
+        for y in 0..3 {
+            for x in 0..3 {
+                g.map.t[idx(px + x, py + y)].owner = Owner::Player;
+            }
+        }
+        let (cx, cy) = g.map.core;
+        g.build_rect(1, cx + 4, cy - 3, cx + 5, cy + 5); // lair 18
+        g.build_rect(2, cx - 3, cy - 3, cx - 2, cy + 5); // farm 18
+        g.recount();
+        for _ in 0..60 {
+            g.try_portal();
+        }
+        assert!(!g.ents.iter().any(|e| e.kind == EK::Chainbreaker));
+        // a veteran creature makes it possible (rooms 16 ring + 36 = 52 tiles, gold 9000)
+        if let Some(e) = g.ents.iter_mut().find(|e| e.creature()) {
+            e.level = 5;
+        }
+        for e in g.ents.iter_mut().filter(|e| e.creature()) {
+            e.alive = false; // free beds
+        }
+        g.ents.retain(|e| e.alive);
+        g.spawn(EK::Kobold, false, cx as f32, cy as f32, 6);
+        let mut seen = false;
+        for _ in 0..400 {
+            g.gold = 9000.0;
+            g.try_portal();
+            seen |= g.ents.iter().any(|e| e.kind == EK::Chainbreaker);
+            g.ents.retain(|e| !e.creature() || e.kind == EK::Chainbreaker || e.level >= 5);
+        }
+        assert!(seen);
+        assert!(g.ents.iter().filter(|e| e.kind == EK::Chainbreaker).count() <= 1);
+    }
 }
 

src/gfx.rs

@@ -675,6 +675,19 @@ fn sprite_rows(k: EK) -> [&'static str; 10] {
             ".kRRRRRRk.",
             "..kkkkkk..",
         ],
+        // obsidian demon with glowing cracks, broken chains and twin axes
+        EK::Chainbreaker => [
+            "s.kkkkkk.s",
+            "sskdoodkss",
+            ".SkeddekS.",
+            ".SkdoodkS.",
+            "kdddoodddk",
+            "kdoddddodk",
+            "SkddooddkS",
+            ".kddddddk.",
+            ".kdok.odk.",
+            ".kkk..kkk.",
+        ],
         EK::Paladin => [
             "...kkkk..w",
             "..kyyyyk.w",
@@ -714,13 +727,14 @@ fn pal(ch: char) -> Option<Color> {
         'C' => c(96, 98, 92),
         'o' => c(226, 124, 48),
         'O' => c(160, 72, 24),
+        'd' => c(44, 36, 48),
         _ => return None,
     })
 }
 
-pub const SPRITE_KINDS: [EK; 12] = [EK::Worker, EK::Kobold, EK::Spider, EK::Mage, EK::Ogre, EK::Knight, EK::Archer, EK::Priest, EK::Dwarf, EK::Paladin, EK::Jailer, EK::Priestess];
+pub const SPRITE_KINDS: [EK; 13] = [EK::Worker, EK::Kobold, EK::Spider, EK::Mage, EK::Ogre, EK::Knight, EK::Archer, EK::Priest, EK::Dwarf, EK::Paladin, EK::Jailer, EK::Priestess, EK::Chainbreaker];
 // width of the sprite texture in pixels
-pub const SPRITE_TEX_W: f32 = (12 * 12) as f32;
+pub const SPRITE_TEX_W: f32 = (13 * 12) as f32;
 pub const SPRITE_TEX_H: f32 = 24.0;
 
 pub fn sprite_index(k: EK) -> u32 {

src/render3d.rs

@@ -976,8 +976,8 @@ impl R3d {
             if !e.alive || e.held {
                 continue;
             }
-            let big = matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer);
+            let big = matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer | EK::Chainbreaker);
-            let w = if big { 0.8 } else { 0.62 };
+            let w = if e.kind == EK::Chainbreaker { 1.0 } else if big { 0.8 } else { 0.62 };
             let h = w;
             let sleeping = matches!(e.job, Job::Sleep(_)) && !e.moving;
             let mut bob = if e.moving { (e.anim * 12.0).sin().abs() * 0.06 } else { 0.0 };
@@ -1045,7 +1045,7 @@ impl R3d {
             if !e.alive || e.held {
                 continue;
             }
-            let big = matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer);
+            let big = matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer | EK::Chainbreaker);
             let head = proj(vec3(e.x, if big { 0.9 } else { 0.72 }, e.y));
             // bar width in block characters, depending on the zoom
             let cols = ((px_per_tile * 0.6 / cw) as usize).clamp(3, 8);
@@ -1265,7 +1265,7 @@ fn draw_shadows(g: &Game) {
         if !e.alive || e.held {
             continue;
         }
-        let r = if matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer) { 0.32 } else { 0.24 };
+        let r = if matches!(e.kind, EK::Ogre | EK::Paladin | EK::Jailer | EK::Chainbreaker) { 0.32 } else { 0.24 };
         disc(vec3(e.x, 0.012, e.y), r, Color::new(0.0, 0.0, 0.0, 0.4), 12);
         let rc = if e.captive != 0 {
             Color::new(0.6, 0.6, 0.6, 0.6)

src/save.rs

@@ -125,7 +125,10 @@ mod tests {
             g.update(0.05); // the scouts warn 30 s before the wave
         }
         assert!(!g.planned_entries.is_empty());
-        let (ex, ey) = g.planned_entries[0];
+        let (cx, cy) = g.map.core;
+        g.spawn(crate::game::EK::Chainbreaker, false, (cx - 1) as f32 + 0.5, (cy - 1) as f32 + 0.5, 1);
+        g.spawn(crate::game::EK::Ogre, false, (cx + 4) as f32 + 0.5, (cy - 1) as f32 + 0.5, 1);
+        let (ex, ey) = (cx + 1, cy + 1);
         let mut cam = Cam::new(ex as f32 + 0.5, ey as f32 + 0.5);
         cam.zoom = 12.0;
         std::fs::write(path, to_json(&g, &cam, &Settings { language: "en".into(), ..Settings::default() })).unwrap();