Delphi, City of the Oracle

(Delphi enters the battlefield with TEN defense counters on it.)
When Delphi, City of the Oracle enters the battlefield, put a legendary 4/5 Serpent creature token with flying named Python onto the battlefield.
{t}: Add {1} to your mana pool. Draw a card.
{1}: Target Human gets +1/+1 until end of turn.