As the Time Sphere entry points out, it takes two successes to move time either forward or backward one turn. Every two successes beyond that point add one additional turn; to shift time for three turns, then, would demand six successes.

If a mage wants to go far back or forward in time, then she needs to be out of combat or other turn-by-turn activities. Using the Time-Sphere Timeline chart, the player then decides how far she wants to go and then rolls two successes for each

success listed on the chart. Going back 50 years, as mentioned earlier, would demand at least eight successes, at eight times the usual amount of Paradox.

Yeah, that’s why people who try such things are seldom seen again…

Using Time 3, a character can invoke a “time warp”-style Effect and either “loop” time within a given area, or else remove herself from the normal flow of time and get a Run Lola Run-style Reboot for a certain number of actions.