Adventure Title
Jewel/Gem/Amulet of (the) Thunder/Rain/Wind/Storm

Alternate title
Demon/Devil/Fiend/Horror of the Citadel/Castle/Fortress

Opening Scene
An island that is Oppressive where they encounter Royalty that is/are Looking for a fight

Plot hook and draw
An anonymous letter that is/has Sent an invitation

Plot Concept
Tear a gateway to an ancient era that is motivated by The voices have spoken...

Primary Antagonist
A corrupt judiciary who/that is Ambitious

Plot fulfillment and location
Willing sacrificial victims from Atlantean ruins