The Thaumostatic Harness is worn in the "chest armor" slot, and provides full flight, similar to creative mode. It provides a 2% bonus to vis costs, and 5% for Aer.
- While Space and Left-Shift move up and down as in creative mode, turning the harness on and off is done with the H key (configurable). When flying, touching the ground makes a "thump" noise, but unlike creative mode, touching down does not turn the harness off.
- The Harness is powered by a jar of Potentia essentia, which must be loaded into the harness beforehand. The fuel burns fairly slowly, but the harness must be taken off to refuel! When wearing the harness, there will be a fuel gauge on the screen. While flying, the gauge will be crowned with flickering sparks (the player themselves will be also be surrounded by mystical lightning).
- By default, horizontal motion is quite slow, but the harness can be enchanted with Haste to increase flying speed. A Thaumostatic Girdle can also be worn to both increase flying speed, and prevent most fall damage.
- Note that the infusion to create this device requires a comparator, which implies access to Nether Quartz.
The Harness's speed was reduced, and the Girdle introduced, in verson 4.1.