What is Starlight Form's Fortitude Save DC?

[jabberwoky]

Starlight Form, the 3rd level Connection Ability for a Star Shaman Mystic states:

Starlight Form wrote:

You can transform yourself into blazing starlight as a standard action. Your body sheds normal light in a 30-foot radius, and you gain the benefits of concealment (20% miss chance). At 7th level, a creature that ends its turn adjacent to your starlight form must succeed at a Fortitude save or be blinded for 1 round. You can maintain your starlight form for a number of minutes per day equal to your mystic level; this duration does not need to be continuous, but it must be used in 1-minute increments. You can forgo the ability's concealment and blinding aspects to instead simply shed light, though this still counts against the ability’s duration for the day.

The bolded emphasis is mine. How does one calculate the Difficulty Class for the Fortitude save?

[Xenocrat]

Connection Power wrote:

At 1st level, 3rd level, and every 3 levels thereafter, you gain a connection power unique to your connection. If a connection power allows a saving throw to resist its effects, the DC is equal to 10 + half your mystic level + your Wisdom modifier. If the power requires an enemy to attempt a skill check, the DC is equal to 10 + 1-1/2 × your mystic level + your Wisdom modifier

[BigNorseWolf]

. If a connection power allows a saving throw to resist its effects, the DC is equal to 10 + half your mystic level + your Wisdom modifier

[jabberwoky]

Thank you.