These lands will allow you to tap for one of two colors of mana, and while similar cards normally come in tapped, by taking a little damage, Shock Lands will enter untapped, meaning you can use them right away
Sticking to the prerelease, this Milotic features a distinct "prerelease" stamp on the bottom right of the card's artwork, clearly denoting it from any other versions
Consider a green removal spell when your opponent attacks too early, or use it as a pseudo-haste effect and end their turn by dropping this or enchanting a creature
Its very powerful, but Araa, Heart of the Spider is a perfect example of cards that dont fit an ally color archetype in Spider-Man Limited
You should always keep up-to-date with these changes because they can affect how your deck plays
Some cards care about mana abilities too, like Moonsilver Key, which can search for an artifact with a mana ability, or Battlemage's Bracers, which copies an ability unless it is a mana ability.