Enchantment, 5UU (7) Whenever a player plays an instant or sorcery card, remove it from the game. Then that player copies each instant or sorcery card removed from the game with Eye of the Storm. For each copy, the player may play the copy without paying its mana cost.
Illus. Hideaki Takamura
A player is considered to have played the instant or sorcery when they announce it and place it on the stack (after paying costs and making choices). So the spell is removed from the game directly from the stack before it can resolve. [D'Angelo 2005/11/01]