Modern card manufacturing techniques utilize heavier textured foils, intricate holo patterns, and sensitive surface coat variants that are highly susceptible to micro-scratching and environmental bowing
Maskwood NexusMaskwood Nexus and Leyline of TransformationLeyline of Transformation provide simple ways to do this, and you can then untap Marwyn, the NurturerMarwyn, the Nurturer or another mana-producing creature to cover the mana
Like most Magic: The Gathering cards, the value of Aang's Journey depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Avatar: The Last Airbender)
While having your lands come into play untapped is oddly worse than having them come into play tapped and then untapping them as Amulet of Vigor does, the combination of offering an extra land drop and working as a bad, backup Amulet of Vigor might be enough for the enchantment to show up in the deck