Actually, hold on, I just figured out how it could work.
The Epic Destiny, "Deadly Trickster", has the Epic Trick power that allows you to regain all daily powers except Epic Trick.
Thus, if you had the Epic Destiny "Deadly Trickster" and you had the Crescendo Sword power, you could conceivably spam it all day long:
Use Crescendo Sword first, then Epic Trick. Since you've already used Crescendo Sword that day (despite having regained it) you could then get around that bit of language-lawyering and spam away.