Vesuvan Drifter

If the copied creature card has {X} in its mana cost, X is 0.

Vesuvan Drifter lets you look at the top card of your library whenever you want (with one restriction—see below), even if you don't have priority. This action doesn't use the stack. Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand.

Any non-copy effect that began to apply to Vesuvan Drifter before it became a copy of a creature card will continue to apply to it after it becomes a copy. Auras and Equipment attached to Vesuvan Drifter will continue to work, as well as counters that change its power and toughness.