Wrenn's Magic Mirror

As you cast the spell, you draw a 5-foot-diameter circle on a surface that you can see, inscribing a sequence of sigils that link you or your location to another creature or sequence of sigils that you know. Striking the circle with a sharp piece of flint, the circle briefly ignites as an iridescent magical window opens within the space you drew, tethering two areas in space and remaining active for up to 10 minutes unless concentration is broken, the spell is dismissed by the caster, or it is dispelled. If you are targeting a creature it must be willing, and if you are targeting a location, it must have an identifiable sigil sequence, rune, unique coat of arms, or other symbol on a 5-foot-diameter surface to uniquely tether it in space. This symbol is not magical until the spell is cast through it, and you can substitute the material cost of the spell when using a symbol to cast the spell this way. If you are attempting to contact a location currently owned and occupied by another creature, the creature will be magically notified and will need to be willing to allow the link.

If cast on a location, both sides of the link can see and hear 25 feet outwards from the mirrors into the linked location for the duration. Other creatures can see and hear through the mirrors when the spell is cast this way. If cast on a creature, both creatures linked are able to see and hear each other so long as they are within 25 feet of and in view of the mirror, as well as can see a 10-foot-radius around each creature. However, they can only hear the creature they are linked with, not other creatures on the other side of the mirror. If you are the creature being contacted and you are not near an identifiable sigil belonging to you, a mirror will open on the nearest available 5-foot-diameter surface.

Casting this spell on the same spot once a day for 1 year makes the mirror permanent, inscribing a unique sigil sequence at its location to denote the location and creature associated with it, and eliminating the need to spend a spell slot when casting the spell. If cast this way at 6th level or higher, it grants the previous benefits as well as the benefits of casting it at higher levels, as shown below.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the mirror can additionally pass objects through it to the linked creature or location, now acting as a wormhole physically tethering these two areas in space. Objects being passed through the mirrors cannot exceed the size of the circle and cannot exceed 500 pounds, and the transfer is instantaneous.

Creatures may also be passed through wormholes created this way, given they are considered Small, Tiny, or under the effect of an enlarge/reduce spell or something similar to reduce their size. For any living creature, the act of passing through a wormhole is incredibly difficult as you are plunging into a vortex of intense magical pressure. When a creature is sent through a mirror, they must roll a d20. On a roll of 10 or lower, they take 3d10 force damage and must roll again. On a roll of 11 or higher, they pass through the wormhole and appear on the other side. If the creature concentrating on the spell jumps through the wormhole and takes damage, they simply make one Constitution (Concentration) saving throw based on the first time they take damage in order to maintain concentration, not any subsequent times thereafter, but if the spellcaster loses concentration the spell instantly ends, the creature instantly takes 6d6 psychic damage, and they are passed through to the other side of the wormhole.