Aether Storm in Homelands had the text: No summon spells may be cast. In future reprints, it changed to creature spells cant be played. The first version of Future Sight stated that you can play the top card of your library. This terminology caused some confusion because play has multiple meanings: in play, play a card, play with the top of your library revealed, and so on
Three Generic and One Blue: Draw a card, then you may return a land you control to its owners hand
The idea for the mechanic was inspired by Figure of Destiny and its pseudo-leveler ability to grow bigger with different levels of mana cost
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When you draw your 2nd card each turn, a foe loses 2 and you gain it too
The Lunar Whale Playing cards from the top of your library is always nice because it sets up good synergies and combos, and it gives you more information