@Override
  protected void onZap(int cell) {

    int reach = Math.min(Ballistica.distance, power() + 4);

    boolean mapUpdated = false;
    for (int i = 1; i < reach; i++) {

      int c = Ballistica.trace[i];

      int before = Dungeon.level.map[c];

      Char ch = Actor.findChar(c);
      if (ch != null) {
        Actor.addDelayed(new Swap(curUser, ch), -1);
        break;
      }

      Heap heap = Dungeon.level.heaps.get(c);
      if (heap != null) {
        switch (heap.type) {
          case HEAP:
            transport(heap);
            break;
          case CHEST:
          case MIMIC:
          case TOMB:
          case SKELETON:
            heap.open(curUser);
            break;
          default:
        }

        break;
      }

      Dungeon.level.press(c, null);
      if (before == Terrain.OPEN_DOOR) {
        Level.set(c, Terrain.DOOR);
        GameScene.updateMap(c);
      } else if (Level.water[c]) {
        GameScene.ripple(c);
      }

      mapUpdated = mapUpdated || Dungeon.level.map[c] != before;
    }

    if (mapUpdated) {
      Dungeon.observe();
    }
  }
  @Override
  protected void evolve() {
    super.evolve();

    if (volume > 0) {

      boolean mapUpdated = false;

      for (int i = 0; i < LENGTH; i++) {
        if (off[i] > 0) {
          int c = Dungeon.level.map[i];
          int c1 = c;
          if (c == Terrain.EMPTY || c == Terrain.EMBERS || c == Terrain.EMPTY_DECO) {
            c1 = cur[i] > 9 ? Terrain.HIGH_GRASS : Terrain.GRASS;
          } else if (c == Terrain.GRASS && cur[i] > 9) {
            c1 = Terrain.HIGH_GRASS;
          }

          if (c1 != c) {
            Level.set(i, Terrain.HIGH_GRASS);
            mapUpdated = true;

            GameScene.updateMap(i);
            if (Dungeon.visible[i]) {
              GameScene.discoverTile(i, c);
            }
          }

          Char ch = Actor.findChar(i);
          if (ch != null) {
            Buff.prolong(ch, Roots.class, TICK);
          }
        }
      }

      if (mapUpdated) {
        Dungeon.observe();
      }
    }
  }