I think Overlord is the best due to its flexibility, but if you want more options, Wood Elves, Farhaven Elf, and Topiary Stomper are all quite reasonable
While it is most likely only a coincidence, a conspiracy theorist might claim some unlucky person at WotC or the printing company received the unenviable task of fishing thousands of Clefable cards out of stacks of cut cards as they were needed as prerelease promos
Zachary had to play catch-up with aggressive play, which meant a lot of cards hitting the discard pile via Professor Sycamore and Ultra Ball
Is Soul's Fire legal to play
With that being the case, you'll have to keep opening packs to get a wide range of them
Landfall Whenever a land you control enters, seek a creature card and manifest it