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
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
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
Like all other cards, your ink will be ready to use again at the start of your next Beginning phase
Once that spell or ability starts to resolve, however, and its controller chooses which permanents and players will get new counters, its too late for anyone to respond.