Nudo lógico

Instantáneo, XUU (2)
Excavar (Puedes remover del juego cualquier cantidad de cartas de tu cementerio en cuanto juegues este hechizo. Jugarlo te cuesta {1} menos por cada carta removida de esta manera.)
Contrarresta el hechizo objetivo a menos que su controlador pague {X}.
Illus. Glen Angus

Instant
Delve (You may remove any number of cards in your graveyard from the game as you play this spell. It costs {1} less to play for each card removed this way.)
Counter target spell unless its controller pays {X}.¹

Crystal Keep Rulings Summaries

• You can cast this with X equal to zero, but it's not generally useful to do so. [D'Angelo 2007/05/15]
• Note - Also see Delve, Rule 502.64.
• Note - Also see X Costs, Rule G24.1.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Visión del Futuro (Common)