Vigilance

Vigilance is a keyword ability on creatures that allows the creature to attack without tapping.

Description
The keyword exists primary on white cards and secondary on green; creatures with vigilance generally are depicted as guards or sentinels. White tends to get this on creatures where the power is equal to or less than the toughness, and seldom with a power greater than 3. Green tends to get this ability on larger creatures to differentiate it from white.

Before it was keyworded, vigilance was known as the Serra ability after Serra Angel. The ability has existed in the game since Alpha, where it was not keyworded but instead had the rules text of the ability written out.

Vigilance was introduced as a keyword in Champions of Kamigawa. Ninth Edition was the first core set to follow. Vigilance was retroactively supplanted, via Oracle, on all cards that had "Attacking doesn't cause this creature to tap." such as Serra Angel itself.

Ikoria: Lair of Behemoths introduced vigilance counters.

Enchantments that grant just Vigilance
One creature All your creatures
 * Eternal Warrior
 * Vigilance
 * Serra's Blessing
 * Brave the Sands

Plane card that grants Vigilance

 * Gavony (all creatures)

Trivia

 * The Vigilance, lifelink, and fear keywords are the only keywords with a card of the exact name (Vigilance, Lifelink</c> and Fear</c> respectively). Flying comes close, with the card called Flight</c>.