Thus, on Delos, an important sanctuary was dedicated to Apollo. Arguably, Apollo's most important power was that of prophesy.  Apollo gets Delphi in his first deed. He is to kill the dragon of Pytho (Delphi). The dragon, Python, protected the sanctuary of Pytho beside the Castilian spring.  It guarded Sibyl as she prophesized by inhaling its "hallucinating" vapors.  The Python was also terrorizing the neighboring villages and pastures.  Apollo slew the Python with his bow and arrow. By killing the Python, Apollo gained control of the oracle and the surrounding country.

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