Cyphers
Cyphers are one-use abilities. In some settings, cyphers are physical items, like a magic potion or high-tech gizmo, but you shouldn't think of them as regular equipment like backpacks, swords, and horses - they have special rules and often aren't available to buy or sell. Cyphers are more like special abilities (from your type or focus) than common equipment.
See the Cyphers chapter for more information on cyphers, including how they work, how many you can carry, and how to get them.
Some character types and some foci allow you to craft cyphers, modify the power level of a cypher, or use a cypher more than once.