Happy 'Tato

{g}{g}{g}{g}{g}{g}{g}{g}{2}
Once per turn; you can activate one of these effects; the next effect you activate doesn't need taps:
• If you activate this effect by tapping land:
You can summon any grass monster without tapping
• If you activate this effect by tapping land:
You can destroy all monsters except "Happy 'Tato" on the field: you can untap all land on the turn you activate this effect