I have a Big Bad Oppressive Government (BBOG) semi-inspired by the Roman Empire with the conceit that “all portals lead to Mul Khuldir,” i.e., that they’ve figured out super-fast logistics based on a central cluster of permanent Teleportation Circles that can be connected to scroll-cast Teleportation Circles near the battlefield ( (Every warmage has Sending to coordinate and then a few Teleportation Circle scrolls to bring in the first support platoon and additional warmages). The Great Mustering Hall in the ancient Dwarven citadel of Mul Khuldir is where they’ve been refining the martial exploitation of portals for hundreds of year and the Magisterium of Arcana has blah-blah tried to suppress all non-government-sanctioned learning / exploitation of magic.
Anyhow, the party has now made contact with the potentially-revolutionary enslaved dwarves inside the citadel and I’m fleshing out what the defenses of the citadel might be. Since portal magic is central to the BBOG and the citadel’s near a thousand years old, I’ve wondered if one thing you could do is: 100’ vertical shaft with a permanent teleportation circle on the ceiling and floor. The floor’s teleportation circle is connected to a vertical (or even pitched up) circle on the walls. You drop a rock or cannon ball down the shaft, it emerges horizontally at speed.
Thoughts?
Do you have a teleportation circle or a portal? A teleportation circle is like a star trek teleporter your velocity is matched with the destination on arrival no cannon.
If you have horizontal portal then sure you could drop a Boulder down such a shaft but I would be careful as this is open to exploit.
Yes, it’s the idea of permanent tele circles.
“Velocity is matched with the destination” : that makes sense, but do you have a citation?
The character’s are time-traveling, are only 6th level, and a single permanent tele circle takes a year, so I’m not fretting too much about being exploited by the players. Plus, it’s a good group so I think we’d work it out.
I reviewed the spell, I was incorrect in assuming no portal was opened with a teleportation circle. In that case it should work out.
Glad you got a good group. My only real advice is stay consistent