Visiting the lost mansion of a conjurer, where portals were opening for a few seconds, a sorcerer tried to keep open one that led to the Elemental Plane of Fire blocking it with an Immovable Rod.
I'm interested in what would happen in order to preserve an internal coherence regarding physical/magical laws that govern the world.
Here are some thoughts that may explain what I mean:
- The object may just remain on one side, and occupy the space that it would have occupied without the portal (e.g. if the portal was lying on a wall, the the rod would have been stuck in the wall). However, this raises another question: on which side of the portal would the object end up?
- The object may just split together with the spacetime as the portal closes, so each part would remain on the side of the portal where it was, effectively cutting the object. In my opinion, however, this mechanic would provide an easy way to cut objects that where supposed not to easily break.
- I may imagine a pressure-like force that acts on objects near/in the portal, inversely proportional to the surface of the portal, so that objects are eventually pushed/sucked on one side. This is an incremental version of the first idea, and it's my favourite at the moment.
So the question is the following: what would happen if I put an Immovable Rod (or in general an object) into a closing portal?