I made a ship!
So, my players have paid for passage on a ship heading up river during tumultuous times in their realm and have found themselves in a bit of a trap....the ship's captain had cast Seeming on the crew, disguising them as living humanoids when, in fact, they are a crew of UNDEAD!! So for this encounter i really wanted to do something special.... I made up a basic water map and put together my "ship on a budget" threw in a couple of 3d printed crates and barrels and voila! the perfect water encounter!