(ritual); concentration, 1 minute/mana
As an action, no sound can pass through a sphere that surrounds you. Until the spell ends, the sphere moves with you, centered on you.
Any creature or object entirely inside the sphere is immune to concussion damage that originates outside the sphere.
Casting this spell on the same spot every day for a year makes this effect permanent on that spot.
You can expend 1 additional mana so no sound can be created within the sphere. Any creature or object entirely inside the sphere is immune to concussion damage, creatures are deafened while entirely inside the sphere, and casting a spell that requires words to be spoken is impossible inside the sphere.
You can expend 1 additional mana to cast the spell centered on a point within 20 meters.
You can expend 1 additional mana to change the duration to 5 minutes/mana.