The Oracle text/ruling on this card is somewhat ambiguous, IMO.
Oracle text wrote:T: Non-Wall creatures the active player controls attack this turn if able. At the beginning of the next end step, destroy each of those creatures that didn't attack this turn. Activate this ability only during an opponent's turn and only before combat.
Unless I'm completely misinterpreting this, I could use this ability and it would destroy tapped creatures and creatures with summoning sickness? But that can't be right.Oracle ruling wrote:If a creature can't attack because of some restriction, or because it is tapped, it is destroyed at the end of the turn.
So what is the interaction if I use this on an opponent and they control:
a) a Birds of Paradise that does not have summoning sickness and they tapped for mana
b) a creature that they cast that turn and does not have haste
Thanks!