Ghost Town gives you a way to bring down your land count on demand without giving up any permanent resources
Pulling off this feat can be tough: You need six legendary creatures in play simultaneously , plus one mana of every color available
The Everywhere token created by Overlord of the Hauntwoods's last ability has the land types Plains, Island, Swamp, Mountain, and Forest
Efficiency can be determined simply by the reward you receive at certain mana costs (Counterspell and Cancel do the same thing, but Counterspell costs less), the total payoff you receive from a single card (Hull Breach and Decimate are both good cards, but Decimate usually covers much more ground), or the payoff you receive in conjunction with other cards (Anointed Procession makes other token production cards completely absurd if unchecked, which is usually better than adding one more card that simply makes tokens like Spectral Procession in a token strategy)
Libera tu lado ms malvado y demuestra que el mal siempre gana