Chant

From the Rulebook

An audible component required by some abilities that sustains their continuing function. Under normal circumstances a player may voluntarily end an ability with an ongoing chant at any time. The audible components of a Chant must be spaced no further than five seconds apart and audible to 50’. Failure to Chant ends the effect. May be spoken while moving. Only one Chant can be maintained at a time.

Rulebook 8.6.3