Angel's Trumpet | Magic: The Gathering
Formats Angel's Trumpet is Legal in
Official Oracle Text for Angel's Trumpet
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.
Official Rulings for Angel's Trumpet
10/4/2004 : It does not affect creatures which did not attack, but which are already tapped at the time the ability resolves.