PRD wrote:
Force of Will (Ex): At 7th tier, you can exert your will to force events to unfold as you would like. As an immediate action, you can expend one use of mythic power to reroll a d20 roll you just made, or force any non-mythic creature to reroll a d20 roll it just made. You can use this ability after the results are revealed. Whoever rerolls a roll must take the result of the second roll, even if it is lower.
The chart shows that Force of Will should be gained at 6th Tier. Which is correct? (If it's at 7th, 6th would be a "dead" tier.)