Its play patterns often involve long, drawn-out turns of tapping and untapping permanents, drawing cards, and generally monopolizing the chess clock of a game
Primarily both are played as a two drop that draws a card, the elf is just a body to be done away with via Skullclamps etc or offer up synergy for better elves where as the wall is more of a speedbump against aggressive decks
Kor Spiritdancer
Giving cards two uses at different points along the curve is something I talk about frequently, especially with cards that have mechanics like flashback or kicker
Its also an artifact, so you have additional synergies with affinity, metalcraft, and so on
Each Medallion reduces spell costs, helping you accelerate your strategy and dominate the game with style