Vigilance in Magic: The Gathering (MTG) is a keyword ability that allows creatures to attack without tapping. This means that after attacking, the creature remains untapped and is available to block during the following turn. It is primarily found on white cards and is secondary in green and blue. Vigilance is beneficial for both offense and defense, as it enables creatures to maintain a defensive position while still being able to attack. This ability is especially useful when combined with other abilities that require creatures to attack. Additionally, vigilance can be granted to creatures through spells, abilities, enchantments, and equipment artifacts. It is considered an evergreen mechanic in MTG, appearing in almost every set and is particularly useful for aggressive decks that focus on attacking. Overall, vigilance is a valuable ability that enhances the strategic options available to players in the game of Magic: The Gathering.