Just pay attention to it on reel 5, this is the only reel that can see it. If you see the dragon egg there, the last symbol that appears in the winning combination will be split into two parts. These parts will have the importance of two separate symbols, so their importance will be twofold. This explains why you can have a combination of 6 symbols in the Dragon Kingdom. This is because in the base game, all symbols except Scatter may be split. This is Dragon Split, the split function of the game.