For that matter, the whole Seven Wonders musical number in the finale, showing each of the Surpeme candidates preparing to perform the titular trials, showing off their powers. It really gives a sense we've come at the end of a long road.
Fiona and Marie, with some assistance from the Ax Man, butchering the directors of the Delphi Corporation.
Misty beating the living shit out of Madison. That's right, she went up to the most dangerous, most tyranny-crazed of the whole group and gave her an epic beatdown without even using any powers but the strength of her bare hands. It's every bit as epic as it sounds.
And not 5 seconds later, the Ax Man comes at them. And gets sent flying by the whole Coven.