What is the range of a Mage's Alter Time?

Question

Alter Time

Alter the fabric of time, causing the caster to return to their current location, health, mana, buffs, and debuffs, when cast a second time, or after 6 sec.
Effect negated if the caster dies within the 6 sec before the effect occurs or moves too far away.

When looking at the spell or the buff for Alter Time, neither actually mentions the range that counts as "too far away." How many yards away from the casting position is a Mage allowed to move before Alter Time no longer works?

Answer 1

This thread (based on user testing) states that the maximum range that this will work over is 100 yards - seemingly. They're speculating that this essentially works as 'whatever distance you cover while the effect is up' but won't undo actions like taking a portal, for example.

Keep in mind it is beta though, so is subject to change.