diff --git a/tests/testBoss.cpp b/tests/testBoss.cpp
index bc4e0ca..ea87e75 100644
--- a/tests/testBoss.cpp
+++ b/tests/testBoss.cpp
@@ -157,3 +157,160 @@ VF_TEST(livingCrystalsHealTheDragonFasterThanTheSwordDrainsIt) {
     DragonFight fight(end, 99u);
     float fullHealth = fight.state().health;
 
+    float totalHealed = 0.0f;
+    for (int step = 0; step < 200; ++step) {
+        BossTickReport report = fight.tick(clingingTo(fight, 5.0f));
+        totalHealed += report.healedThisTick;
+    }
+
+    CHECK(totalHealed > 0.0f);
+    CHECK(fight.state().damageTaken > 0.0f);
+    CHECK_NEAR(fight.state().health, fullHealth, 1e-3f);
+    CHECK(!fight.exitPortalOpen());
+    CHECK(fight.aliveCrystalCount() == static_cast<int>(fight.crystals().size()));
+}
+
+VF_TEST(aCagedCrystalIgnoresShotsUntilTheCageComesDown) {
+    EndGenerator end;
+    DragonFight fight(end, 7u);
+
+    int cagedIndex = -1;
+    for (int index = 0; index < static_cast<int>(fight.crystals().size()); ++index) {
+        if (fight.crystals()[static_cast<std::size_t>(index)].cageIntact) {
+            cagedIndex = index;
+            break;
+        }
+    }
+    CHECK(cagedIndex >= 0);
+    if (cagedIndex < 0) return;
+
+    DragonPlayerInput blocked = clingingTo(fight, 0.0f);
+    blocked.shootCrystal = cagedIndex;
+    CHECK_EQ(fight.tick(blocked).crystalsDestroyed, 0);
+    CHECK(fight.crystals()[static_cast<std::size_t>(cagedIndex)].alive);
+
+    DragonPlayerInput breaking = blocked;
+    breaking.breakCage = true;
+    CHECK_EQ(fight.tick(breaking).crystalsDestroyed, 0);
+    CHECK(!fight.crystals()[static_cast<std::size_t>(cagedIndex)].cageIntact);
+
+    CHECK_EQ(fight.tick(blocked).crystalsDestroyed, 1);
+    CHECK(!fight.crystals()[static_cast<std::size_t>(cagedIndex)].alive);
+
+    // A second shot at the same wreck changes nothing.
+    CHECK_EQ(fight.tick(blocked).crystalsDestroyed, 0);
+    // Nonsense indices are ignored rather than crashing.
+    DragonPlayerInput bogus = clingingTo(fight, 0.0f);
+    bogus.shootCrystal = 9999;
+    CHECK_EQ(fight.tick(bogus).crystalsDestroyed, 0);
+}
+
+VF_TEST(theWholeDragonFightRunsFromTheCrystalsToTheEgg) {
+    EndGenerator end;
+    DragonFight fight(end, 4242u);
+    int crystalCount = static_cast<int>(fight.crystals().size());
+
+    CHECK_EQ(shatterEveryCrystal(fight), crystalCount);
+    CHECK_EQ(fight.aliveCrystalCount(), 0);
+
+    int descentTicks = 0;
+    while (fight.state().phase != BossPhase::Perching && descentTicks < 200) {
+        fight.tick(clingingTo(fight, 0.0f));
+        ++descentTicks;
+    }
+    CHECK(fight.state().phase == BossPhase::Perching);
+
+    int settleTicks = 0;
+    while (fight.state().position.y > fight.portalCenter().y + fight.settings().perchHeight + 0.01f &&
+           settleTicks < 300) {
+        fight.tick(clingingTo(fight, 0.0f));
+        ++settleTicks;
+    }
+    CHECK(settleTicks < 300);
+    CHECK_NEAR(fight.state().position.y,
+               fight.portalCenter().y + fight.settings().perchHeight, 1e-3f);
+
+    BossTickReport report;
+    int killTicks = 0;
+    while (!report.defeated && killTicks < 600) {
+        report = fight.tick(clingingTo(fight, 8.0f));
+        ++killTicks;
+    }
+
+    CHECK(report.defeated);
+    CHECK(fight.state().phase == BossPhase::Defeated);
+    CHECK(!fight.state().alive);
+    CHECK(!fight.state().bar.visible);
+    CHECK_NEAR(fight.state().health, 0.0f, 1e-4f);
+    CHECK(fight.state().attacksLaunched > 0);
+    CHECK(fight.exitPortalOpen());
+    CHECK(fight.dragonEggDropped());
+    CHECK(fight.eggPosition() == Vec3i(0, end.surfaceHeight(0, 0) + 1, 0));
+
+    // The tick after the kill is a no-op, not a second death.
+    BossTickReport after = fight.tick(clingingTo(fight, 8.0f));
+    CHECK(after.defeated);
+    CHECK(!after.phaseChanged);
+
+    World world;
+    CHECK(fight.placeVictoryStructures(world, end));
+    CHECK(world.blockAt(0, end.surfaceHeight(0, 0), 0) == Block::EndPortal);
+    CHECK(world.blockAt(2, end.surfaceHeight(0, 0), 2) == Block::Bedrock);
+}
+
+VF_TEST(aLivingDragonRefusesToHandOverItsRewards) {
+    EndGenerator end;
+    DragonFight fight(end, 5u);
+    World world;
+    CHECK(!fight.placeVictoryStructures(world, end));
+    CHECK_EQ(world.chunkCount(), 0u);
+    CHECK(!fight.dragonEggDropped());
+}
+
+VF_TEST(twoDragonFightsOnTheSameSeedAndScriptRunIdentically) {
+    EndGenerator end;
+
+    auto playOut = [&end](std::vector<float>& healthTrack, Vec3& endPosition, int& attacks) {
+        DragonFight fight(end, 31337u);
+        shatterEveryCrystal(fight);
+        for (int step = 0; step < 300; ++step) {
+            BossTickReport report = fight.tick(clingingTo(fight, 3.0f));
+            healthTrack.push_back(report.bossHealth);
+        }
+        endPosition = fight.state().position;
+        attacks = fight.state().attacksLaunched;
+    };
+
+    std::vector<float> firstTrack;
+    std::vector<float> secondTrack;
+    Vec3 firstEnd;
+    Vec3 secondEnd;
+    int firstAttacks = 0;
+    int secondAttacks = 0;
+    playOut(firstTrack, firstEnd, firstAttacks);
+    playOut(secondTrack, secondEnd, secondAttacks);
+
+    CHECK_EQ(firstTrack.size(), secondTrack.size());
+    for (std::size_t i = 0; i < firstTrack.size() && i < secondTrack.size(); ++i) {
+        CHECK_NEAR(firstTrack[i], secondTrack[i], 1e-6f);
+    }
+    CHECK_NEAR(firstEnd.x, secondEnd.x, 1e-6f);
+    CHECK_NEAR(firstEnd.y, secondEnd.y, 1e-6f);
+    CHECK_EQ(firstAttacks, secondAttacks);
+    CHECK(firstAttacks > 0);
+}
+
+VF_TEST(theWitherIsCalledOutOfASoulSandPatternInEitherOrientation) {
+    Vec3i base{4, 10, -3};
+
+    World alongX = witherAltar(base, true);
+    bool orientation = false;
+    CHECK(witherPatternAt(alongX, base, true));
+    CHECK(!witherPatternAt(alongX, base, false));
+    CHECK(findWitherPattern(alongX, base, orientation));
+    CHECK(orientation);
+
+    World alongZ = witherAltar(base, false);
+    CHECK(findWitherPattern(alongZ, base, orientation));
+    CHECK(!orientation);
+