Dunamancy

 is a new school of magic derived from Dunamis, which is in turn derived from the Beacons.

While spending down time in Archive of the Cobalt Soul in Zadash, Caleb Widogast researched methods of controlling time. He discovered information about some newer arcane experiments being conducted by the Soltryce Academy in Rexxentrum. A newer magical energy seems to have been discovered, or possibly rediscovered, from the Age of Arcanum. This energy is being referred to by the Soltryce mages as "Dunamis". Other than that, there's very little information: anything else is the proprietary knowledge of the Academy.

While searching the basement of Yeza Brenatto's apothecary in Felderwin, the Mighty Nein find notes of a Cerberus Assembly researcher. The Assembly has been doing experiments with a Beacon. The "dunamis field" from the experiments has covered large areas, causing people to sometimes feel sluggish and sometimes move at unnaturally fast speeds. The Kryn Dynasty of Xhorhas has the ability to use Dunamancy to manipulate gravity, entropy, and time. The Kryn have been researching its use for centuries in Ghor Dranas.

It has been difficult for the Cerberus Assembly to create an object that can sustain the energy of a dunamis field. Yeza Brenatto has been working with the Cerberus Assembly and distilled one vial of dunamis. They have plans to make more once they can remove the Beacon from the process. The notes say that Trent Ikithon has found some students who show signs of being skilled at Dunamancy.

After emerging from the worm tunnels into Xhorhas, the Mighty Nein were ambushed by a pack of gnolls, a Kryn Dynasty warrior, and a mage. The mage cast two dumanancy spells- Compress Gravity and Vacuum Blast.

Essik Theylas teaches Caleb two dunamancy spells during his visit in the episode. He mentions spells that revolve around "density, gravity, things that manipulate the relationship between objects or are you more interested in the bending of fate, destiny or do you wish to find ways to sap and scatter the potentiality of your enemy." In the end, Caleb chooses to learn about fate and Essik learns him two dunamis spells.

Known Spells

 * Compress Gravity
 * Compress Gravity causes targets to make a Constitution saving throw. The targets take force damage and their speed is reduced to half for one round.
 * Vacuum Blast
 * Creatures in a 20 ft radius around a point of the caster's choosing make a Constitution saving throw and take force damage.
 * A high level spell involving quantum entanglement

Trivia

 * The Dunamancy school of magic and its spells are a homebrew creation of Matthew Mercer.
 * Dunamis appears to heavily rely on quantum mechanics, including the Many Worlds Interpretation that results in multiple versions of us existing based on the possibilities explored or left to explore to another version of ourselves in another timeline. Each of the members of the Mighty Nein have experienced this sensation in their use of the Fragments of Possibility. However, having much more experience with this magic, the Kryn echo knights and dunamancers seem able to call upon their alternate selves to aid them in battle, in the forms of shadowy echoes.
 * "Dunamis" is the classical pronunciation of the Greek word δύναμις (dynamis), meaning power, especially of divine origins.