If Machine God's Effigy copies a land with a basic land type that has become a creature due to an effect, it will not have any mana abilities that land had due to its land types (it will have the one it gives itself, though)
Merry doesn't actually expressly mention Food at all, but it's implied given that she partners with Pippin, Warden of Isengard, who not only creates Food, but also sacrifices them for an Overrun-style effect
There were an increased 18 Enchanted cards, meaning a total of 226 cards to collect
Dungeons Well, obviously Finally, we have dungeons
Collector Boosters may also contain nonfoil or Double Rainbow Foil Serialized Elven, Dwarven, and/or Human Sol Ring cards
There are also some number of quality utility lands that involve sacrificing that make this card even better: favorite Mirrorpool springs to mind, but theres also Buried Ruin, Command Beacon, Inventors Fair, Urzas Saga, and if youre a degenerate Strip Mine