Now there's odd...
...took a moment to think how on earth you cleared the board with no exploders in play... or got a mana surge at the same time!
...but I am guessing you just cast your Acolyte, after he'd buffed his magic stat over and over again, and turned all the board except one to brown, so it all vanished in one match... cool!
Some screenshots to fish for:
- an exploder screen with precisely two gems left on the board
- a Rowanne cast wipe hitting every enemy for over 100 damage
- a Sand Shark eating a Great Maw (big fish little fish, anyone)