The Dominion's Prophecy appears in Return to Halloweentown.

The Prophecy

"And it shall come to pass,
at the close of the first millennium,

at the rise of the Halloween moon,

a Cromwell of great power
will embrace the Gift

and all the world will find peace
under her dominion."

Marnie Piper is the Cromwell
of the prophecy,

the one we have waited for.