|Placed On||Lands or enchantments|
The first cycle, from Ice Age, includes the cards Land Cap, Veldt, River Delta, Lava Tubes, and Timberline Ridge. These lands are dual lands and enter the battlefield untapped, but use depletion counters to delay their untapping.
The second cycle, in Mercadian Masques, includes Remote Farm, Saprazzan Skerry, Peat Bog, Sandstone Needle, and Hickory Woodlot. This cycle enters the battlefield tapped and with two depletion counters, and has only one mana ability, which removes a depletion counter to add two mana, rather than the typical one. These lands are sacrificed when their mana ability resolves if they have no further depletion counters.