Artefacto

: Pon un contador de moneda sobre el Pozo de los deseos. Cuando lo hagas, puedes lanzar desde tu cementerio la carta de instantáneo o de conjuro objetivo con valor de maná igual a la cantidad de contadores de moneda sobre el Pozo de los deseos sin pagar su coste de maná. Si ese hechizo fuera a ir a tu cementerio, en vez de eso, exílialo. Activa esto solo como un conjuro.
You cast the instant or sorcery while the ability is resolving and still on the stack. You can’t wait to cast it later in the turn. Timing restrictions based on the card’s type are ignored.
If the spell you cast has
in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
Since you are using an alternative cost to cast the spell, you can’t pay any other alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, you must pay those.