Cannons at the Gate

This encounter was originally themed around a sea adventure on a remote deserted island. The water in the cave and cavern is created from the tides of the ocean, filling the room and covering the floors in around a foot of water, but can be used in any underground campaign setting. Due to the use of cannons, this challenge is designed to be used in an period of time and/or campaign/adventure where black powder or some equivalent is available. The use of this encounter will eventually destroy a lot of the room it takes place in, unless the PCs abort the challenge within the first few rounds, at which point they may come back finding things just as they left it, unless other adventurers tested their fate. It is recommended that one uses this encounter knowing there is no way out beyond a certain point but to move forward.

As mentioned, I've designed this encounter within an adventure that was meant to be a tangent in one of my campaigns. The cave can very well be used anywhere in your campaign. I've adjusted any stats listed to fit 3/3.5e campaigns but have listed the information for 4th Edition... Please let me know if adjustments need to be made. With that understanding, let's begin...