If my opponent attacks with Trepanation Blade and I use an instant that returns all attacking creatures to their owners hand, will the effect of the blade still play out?
The Blade says:
Whenever equipped creature attacks, defending player reveals cards from the top of his or her library until he or she reveals a land card. The creature gets +1/+0 until end of turn for each card revealed this way. That player puts the revealed cards into his or her graveyard.