Before you clicked done, you produced 6 quanta and consumed it.
Every card you used, had a relevant effect on battle. (Not like playing Holy Flash on yourself at 100 life.)
Sundial, Precog, Photon, Spark and Dagger not allowed.
You played 6 non-pillar card.
No pet.
Won Coin Toss.
Oh, I thought you meant that we had to have 6 quanta when we pressed done.
Can we produce more than 6 quanta, as long as we use it all?
Otherwise, this seems impossible, as it takes 2 towers to generate 6 quanta, any other non-nova/cremation (which produce too much) source doesn't work until the turn ends, and with 7 cards, only 5 non-pillar cards are left. Without precognition, there's no way to play 6 non-pillar cards.
The obvious answer is that I'm overlooking something, which is completely possible.
Edit: Do pendulums count as pillars?
5 darkness pendulums, a darkness tower, and dusk mantle (unupped)?