Selesnya Loft Gardens (Planechase Anthology)

If an effect would put one or more tokens onto the battlefield, it puts twice that many of those tokens onto the battlefield instead. If an effect would place one or more counters on a permanent, it places twice that many of those counters on that permanent instead. Whenever you roll Chaos, until end of turn, whenever you tap a land for mana, add one mana to your mana pool of any type that land produced.