Teleportation Circle Link

This spell allows the caster and a limited number of other creatures to teleport from one permanent teleportation circle to another known permanent teleportation circle. Upon completion of the spell, a 10-foot diameter portal appears with the caster at the center. Any creature that enters the portal instantly appears within 5 feet of the destination circle or in the nearest unoccupied space if that space is occupied. In addition to the caster, one additional creature may pass through the portal, after which the portal immediately closes. This spell must be cast from the center of the departure circle. Unwilling creatures may make a WIS save to avoid teleportation, but will still count against the maximum number of creatures affected.

Divine casters (Cleric, Druid) must spend time studying a circle to guarantee a successful link. Studying a circle requires 10 minutes and a successful Arcana check (DC 16). If an arcane caster that knows the Teleport Circle spell provides assistance, the check can be made with advantage. Arcane casters can learn circle symbols normally for use with this spell.

Attempting to teleport to a circle on a different plane has a 10% chance of failure, in such an event, this spell cannot be used again from the same source circle until after at least 24 hours have passed. 

The spell cannot be completed if attempting to teleport to a permanent circle that does not exist.

If cast as a ritual, assume the highest level spell slot available to the caster, but the spell cannot be cast (or attempted, in the event of failure) again (even normally) until after completing a short rest.