Burning Tree of Sato

Burning Tree of Sato enters the battlefield tapped.
Burning Tree of Sato does not untap during its owner's next untap step unless they control 3 Mountain or 3 Forest.
{t}: Add {r}{g} to your mana pool.
{r/g}{r/g}{r/g}{r/g}{r/g}{r/g}{r/g}{r/g}{t}: Destroy all lands not
named Mountain or Forest.