The Great Collision

Forests lose all abilities and gain: "{t}: Add {w} to your mana pool."
Plains lose all abilities and gain: "{t}: Add
{r} to your mana pool."
Swamps lose all abilities and gain: "{t}: Add {u} to your mana pool."
Islands lose all abilities and gain: "{t}: Add {g} to your mana pool."
Mountains lose all abilities and gain: "{t}: Add {b} to your mana pool."