ストラ (sutora?) would not be a typical way to transliterate "sutra", however this is likely the intended meaning as the text that appears in the circle resembles Sanskrit. In-universe, the symbols that appear in the attack animation are Terran script.
Stellar Circle 5 is a Dyne ability usable by Zidane while in Trance and while having access to the skill Annoy. It costs 24 MP to use and inflicts non-elemental damage to one enemy equal to 250% of Zidane's normal physical attack.
Dissidia Final Fantasy (2008) and Dissidia 012 Final Fantasy
Stellar Circle 5 is a ground HP magic attack for Zidane, learned at level 31. It requires 180 AP to master and 40 CP to equip (20 when mastered), has Melee High priority, and has the Absorb effect. When used, the ability can draw in the opponent into it to damage them.
In Dissidia 012, it is learned at level 12, requiring 130 AP to master and 30 CP to equip (15 when mastered).
Stellar Circle 5 is a Bravery attack for Zidane. It consists of a 3 hit melee BRV attack with a low chance of inflicting SPD Down I to the target for 3 turns and SPD Up I to Zidane. It has a high turn rate.
As of a patch however, its base uses increase by 2 while also granting a Max BRV Up I buff to ZIdane for 3 turns at the start of the attack animation, while also having its overall potency and debuff/buff rates increase when the Extension crystal passive is equipped upon being Awakened.
Stellar Circle 5 is the Ultimate of Thief of Tantalus job.
Sutra (IAST: sūtra सूत्र) is a Sanskrit word that means "string" or "thread". A sutra is a rule or thesis in Sanskrit grammar or Hindu law or philosophy, or a scriptural narrative, especially a discourse of the Buddha.