This will appear as a sidebar or optional tool in the Wandering Heroes of Ogre Gate rulebook.
USING TOTAL SUCCESSES AS AN IMPEDIMENT TO TRULY DIFFICULT TASKS
Some things in life are nearly impossible. The GM always has the ability to say a skill roll can’t apply to a truly impossible situation (for example, attempting to breath water). But sometimes the GM needs to set a higher difficulty than a mere TN 10 affords. In such cases, requiring multiple Total Successes is an option. The GM can decide how many are required for a given task (and can also decide if they need to be achieved in a single roll or in a series of rolls). This tool is meant to give the GM flexibility during play to deal with edge cases.