Amphibian Downpour overwrites all colors and creature types the enchanted creature has
Instead of playing on a play mat like the game usually is, Gateway comes equipped with a board that has a play area for your active cards and your inkwell, as well as a lore tracker in the middle of the board
Like all other cards, your ink will be ready to use again at the start of your next Beginning phase
Another way to exploit enchantment animation cards, especially Opalescence, is to send as many enchantments to your graveyard as possible with the likes of Careful Study or Frantic Search, and then return them all at once with Replenish to create a huge army for just 4 mana
With absolutely awesome arboreal artwork from Larry MacDougall (a criminally underrated MTG artist whose work only graces the Lorwyn-Shadowmoor block of four sets and one card in Commander Masters ), this card remains a potent one-drop in the early game or the late game
I also think the foil at $2ish is probably a good pickup as it does similar things to an EDH game