Althor's Area Audible

Background: Althor the One Armed is well known as a master spell creator specializing in force field spells of great elegance and complexity.  He was started down this path when he barely survived a gnoll attack as a young fighter mage (Ax Specialist) by improvising a V only magic missile spell to kill the gnoll that had just ripped off his right arm. He went on to develop a whole class of force field based spells of which perhaps the best known are his Althor's Arm, Althor's Return and Althor's Ax spells.

Casting Restrictions: All of Althor's 2nd level spells require at least a 16 INT to learn and cast. All of them are cast as a 2 minute ritual which embeds a spell pattern into the creature or item to be affected or who will be triggering the spell. Once the ritual has been cast the spell can be triggered  as either a reaction or an opportunity action by EITHER a quick 1 hand gesture OR a single keyword as a reaction. If cast as a full ritual (12 minutes cast time) the spell counts as a standard ritual spell. If the shorter ritual is used, then a spell slot is used up.

Spell: Althor's Area Audible

Once triggered, it creates a spherical field of force with a radius of 20' centered on the coin owner that negates any silence or  similar effects within it as well as any excessive (Thunder) sounds so that the caster and those within the sphere can hear and cast normally and are immune to Thunder attacks.