Sakûra, Mighty Spring

{t}: Add {g} to your mana pool for each Tree
Land card you control.
{t}: Target Tree Land card becomes a 5/5 green
Tree creature token with "This creature deals
damage to each non Tree creature equal to the
number of Trees in play." and haste until end of
turn.
Whenever you tap Sakura, Mighty Spring for
mana, you may untap another target Tree card
you control.