Ice on the Water

From publisher blurb: A covern of powerful barbarian druids is threatening the citizens of the city of Findalynn. Titanic storms, floods, heat waves, and basic pestilence - conjured by the druids - have plagued the city for the better part of a year. The lords of the city want war with the barbarian tribes and they are summoning forces for just that purpose. Enter Benitio Hathoway, the academic -and thus black sheep - nephew of the city's High Admiral. He has decided on another plan of action that might not only save the city but also the lives of countless warriors on both sides. Delving into ancient texts, Benitio has uncovered a powerful elemental magic known as the Four Branches, which have the ability to counter any natural magic the druids have conjured. However, the material components of the spell are living pieces of the four elemental world trees: The Vernal Druidic Yew, the Autumnal Bloodgood Maple, the Summer Blue Wisteria, and the Winter Silver Fur. These ancient trees are said to exist in the far North and are guarded by powerful elemental creatures known as Elinteritus, the Beasts of Elemental Destruction. Can the party travel north to begin this three part adventure for 5-6 characters levels 10+? The adventure is available in both AD&D and 5th Edition mechanics.