Selesnya Loft Gardens is a common Plane — Ravnica card from Planechase 2012 Planes (OPC2), collector number 33. Current market price: $0.43, TCGplayer market prices via Scryfall.
If an effect would create one or more tokens, it creates twice that many of those tokens instead. If an effect would put one or more counters on a permanent, it puts twice that many of those counters on that permanent instead. Whenever chaos ensues, until end of turn, whenever you tap a land for mana, add one mana of any type that land produced.