Vitu-Ghazi, the City Tree

{g/w}{g/w}{1}: Create two 3/3 green Centaur creature tokens.
{g}{w}{2}: Creat a 6/6 green Wurm creature token.
{g}{w}{6}Tap any number of creatures with total power 10 or greater: Transform Vitu-Ghazi, the City Tree to Vito-Gahzi the Great Elemantal whith X life where X is the life of Vitu-Ghazi, The City Tree.
Creatures you control gain: "{t}Vitu-Ghazi, the City Tree gains 1 life."
Creatures you control have vigilance.