The minimum number of successes required to complete a test depends on the action’s difficulty.
The difficulty is measured from 0 to 4 (4 being the standard human maximum) and is determined by the GM on a case-by-case basis.
Higher difficulty levels can only be overcome with Power factors, which vary according to the type of universe you are playing in.
You should clearly distinguish between difficulty and advantages/disadvantages. Difficulty is related to the complexity of the action itself, and disadvantages/advantages represent secondary elements that influence the situation (the circumstances). Same for rerolls.
| Difficulty of the action | Example | Number of successes needed |
|---|---|---|
| Easy | To steer a ship, to observe the behavior of a bird | 1 success |
| Average | Dive from a rocky peak into the sea, follow a trail | 2 successes |
| Difficult | Hiding from a monstrous predator, deciphering an unknown language | 3 successes |
| Extreme | Riding a dragon, targeting a tank’s weak point to destroy it in one hit. | 4 successes |
| Superhuman | Lifting a tank. | 5 successes |
| Amazing | To make a desert bloom. | 6 successes |
| Heroic | Stopping a giant meteorite. | 7 successes |
| Legendary | To bring someone back to life. | 8 successes |
| Mythical | Going back in time. | 9 successes |
| Divine | Killing a god, altering the molecular composition of the universe | 10 successes |
Note that difficult tests are truly difficult. A character with a rather low ability score has virtually no chance of succeeding at a difficult action. The character in question must find tricks, allies, or ideas to gain an advantage, or use Power factors.