Justice League Unlimited, Season 2

Felix Faust:
That's never going to work. When did the Greeks ever use precipitate of bismuth in their potions?

Tala:
The Greeks didn't. But I'm making a counter-potion, remember?

Felix Faust:
Tala, you've come a long way since my untimely demise. But the student, however gifted, still has much to learn from the teacher.

Tala:
And I'm supposed to take advice from you, when without my spell, your spirit would have been — poof! — lost on the winds.

Felix Faust:
Yes. So very kind of you to trap me in this mirror for all eternity.

Tala:
Beats the alternative.

Felix Faust:
True enough.