All Lucky 7s

All Lucky Sevens is a status in Final Fantasy VII that occurs when a character's HP lands on exactly 7777. When this happens, the character begins attacking all enemies in the battle, with each hit doing 7777 damage. Except in the case of Emerald and Ruby WEAPONS, this effect will kill all enemies long before the effect ends. In the case of the WEAPONS, the character will deliver 64 blows for a total of 497,728 damage.

After the battle ends (or the effect in the case of the WEAPONS), the all luck sevens character will have their HP reduced to 1 to prevent the effect being carried over from battle to battle.

Achieving All Lucky Sevens
The majority of players encounter All Lucky Sevens through random chance. However, there have been attempts to manipulate the effect so it can be used at will. While there is no (known) exact way to get a character's max HP to be exactly 7777, it has been done on at least one occasion by Clarinet Hawk. This was done through manipulation of matiera, using the HP changes to get the character's (in this case, Tifa's) HP to max exactly on 7777. Materia manipulation can also be used to get a character's MP to land exactly on 777, then use an HP<-->MP materia and immediately remove it to lower the character's HP to 777. Potions can then be used to raise the character's HP to 7777. A third method involves using the Cat's Bell item. The equipped character should be lowered below 154 or 1554. Because the Cat's Bell raises HP as the party walks, and the HP is always left at an even number, the player can easily get an character's HP to 154 or 1554. Once the character's HP reaches these values, the Cat's Bell should be unequipped and the player should enter battle. In battle the Enemy Skill Laser should be used to halve the character's HP. With the HP now at either 77 or 777, potions can easily be used to raise the character's HP to 7777 and have all lucky sevens.