The spell "alter fortune" allows the subject of the spell to immediately re-roll any dice-roll the character just made. It also states that the target 'must abide by the second roll'.
With that in mind- How many re-rolls can the spell grant a character for a single roll? RAW it seems to state that it allows you to roll a specific check as often as you can cast the spell, but still restricts you to abide only by the second roll made, no matter how many rolls you actually make. Is this true?