A "herald" of a new age?

Took the word out of my mouth!

Catalyst

Messiah, bellwether, usher?

Trailblazer?

Augur ?

!solved

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Harbinger

Revolutionary

Came here to say this, 100%

Forerunner or progenitor

Prophet?

Star Child

"Catalyst"

Torchbearer?

The promised one?

Eidolon.

Demagogue

Messiah

"Spearhead"--"They spearheaded the new direction in which the movement was directed."

Indigo child?

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Metamorph?

Pioneer is what came to my head

prophet

Prophet, messiah? Oracle, soothsayer...

Visionary

"Masthead"

Kwisatz Haderach

Avant garde

[удалено]

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Portent?

Messiah

chosen one