All creatures have vigilance.
At the beginning of each player's end step, tap all untapped creatures that player controls that didn't attack this turn. Angel's Trumpet deals damage to the player equal to the number of creatures tapped this way.
10/4/2004 Angel's Trumpet affects creatures with Defender and other creatures that can't attack for some reason.
10/4/2004 It does not affect creatures which did not attack, but which are already tapped at the time the ability resolves.