Hesitation

Enchantment, 1U (2)
When a player casts a spell, sacrifice Hesitation. If you do, counter that spell.¹
Gerrard hesitated, looking up at an enemy ship. The future hesitated with him, changed forever by the pause.
Illus. Pete Venters

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: Playing a land is not casting a spell, so playing a land will not trigger this card.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Stronghold (Uncommon)