The elf is the original mana dork that set the template for green acceleration, while the bird adds a big bonus by fixing any color and even has flying, which makes it a staple in all kinds of multicolor decks
"Review: Spectrobes"
You dont have to stick with one over the other, but they do attempt to force you to via loyalty schemes and the respective Registry services
Even a 2/1 that ramps and draws cards struggles to survive the way Orcish Bowmasters and Ajani, Nacatl Pariah punish creature decks
Additionally, collector numbers for ripple foil tokens with the MH3 set code as well as the front and back side order in which tokens appear differ in Graveyard Overdrive Collector's Edition, where tokens appear as follows: 1 Goblin // Tarmogoyf token 1 Tarmogoyf // Goblin token 1 Tarmogoyf // Saproling token 1 Dragon (Broodmate Tyrant) // Treasure token 1 Zombie // Insect (Black-Green) token 1 Insect (Black-Green) // Zombie token 1 Beast (Black) // Shapeshifter (Blue) token 1 Shapeshifter (Blue) // Dragon (Broodmate Tyrant) token 1 Saproling // Emblem (Garruk, Apex Predator) token 1 Dragon (Broodmate Tyrant) // Copy token See the tokens and emblem from Graveyard Overdrive and Graveyard Overdrive Collector's Edition (tokens and emblem) in the Modern Horizons 3 Card Image Gallery
3 Booster Packs As with previous Promo-A events, the Blastoise Drop Event features Solo Battles across four difficulties: Beginner, Intermediate, Advanced, and Expert