Circle of Retreat

As you cast the spell, you lay out a circle of silver dust mixed with diamond flakes. This spell when fired will open a portal and teleport any entity within the circle ten miles away in a direction you choose. The portal instantaneously opens and teleports then instantaneously closes upon teleporting the creatures within the circle. The distance can be extended by ten miles up to a maximum of 70 miles away at the risk of taking a point in exhaustion for every ten miles over the base ten. The caster must make a CON saving throw to go over ten miles away and the DC increases from 5 up by 5 for every 10 miles. On a fail the caster takes a point in exhaustion and falls unconscious. If the caster fully exerts themselves to go the maximum of 70 miles they must make a CON saving throw of DC 20. On success the caster drops to 1 HP and falls unconscious on a fail the cast dies.