Two of the four members of the coven were in the woods -- Trini, of course, wasn't there, nor was Persephone. Athena and Yuki, however, very much WERE there, and were chanting by a small brook.
"We have made the sacrifices. We have pledged our loyalty and our fealty. Grant us the power...grant us the power needed to destroy our enemies and return balance to our souls. Grant us our boon, and we shall serve you in all things, forevermore."
Before them, the brook started to bubble and boil.
This was probably a good thing.