Grassland Highwater

Grassland Highwater enters the battlefield tapped.
({t}: Add {w} or {u})
{2}{w/u}, {t}: Until end of turn, target creature you
contol gets +1/+0 and vigilance if it's white and
+0/+1 and flying if it's blue.
The first gen farm bots could withstand the unrelenting
heat of the fields better than humans but rusted in the
ever rising groundwater.