Twin Portals

You create two identical, 5-foot diameter portals, both within range,  that lead to each other. All energies, such as light or magic, as well as all objects, that can fit within the portals and pass through one come out the other, transported between seamlessly, as if the two locations were right beside each other. The portals are nearly invisible, aside from that the other side of the portal is visible, and the air around them is slightly distorted. An unsuspecting victim might not notice one and might step through by accident. Someone who does not want to fall through would make a Dexterity saving throw to not fall in.