Editing Umbral Domains: Skaldic System (section)

=== Extended Actions ===
Extended actions are those that can be completed through multiple cumulative attempts. With extended actions the Storyteller sets a DC, required MoS, and time incriment that each attempt can take. Each time the character makes an attempt they spend an incriment of time and roll against the DC set by the storyteller.  Any MoS they obtain through this process is cumulative with later attempts. The character completes the action when they've accumulated a total MoS equal to the value set by the Storyteller.

In general rolling less than the DC doesn't detract from the character's accumulated MoS, but a botch will.  Of course on an extended action the character can always try to ''play it safe'' (see below)