Deal physical damage by luck.
Lucky Seven (リーチセブン, Rīchi Sebun?, lit. Leech Seven) is a recurring ability in the series. It is an ability used exclusively by Zidane Tribal. The ability is an allusion to All Lucky 7s from Final Fantasy VII.
IX Lucky Seven is an ability used by Zidane from the Skill command, learned for 55 AP from the Gladius, Exploda, Rune Tooth, The Tower, and Thief Hat. If Zidane's current HP ends in 7, the skill randomly inflicts 7, 77, 777 or 7777 damage to a single enemy. If not, it inflicts 1 damage to the enemy. Lucky Seven costs 6 MP to use, and enables usage of Solution 9 when Zidane enters Trance.