The Last Sakura

The Last Sakura enters the battlefield tapped.
{t}: Add one mana of any color. If this mana is
spent to cast a spell with two or more colors, add
{1} and one mana of any color instead. The Last
Sakura deals one damage to you.
If a Plains, Swamp, Island, Forest, and
Mountain are all in play, all lands loose all
abilities and have, "{t}: Add one mana of any
color."