Final Fantasy VII/Status Effects

During battles many status effects can be induced on your party or enemies.

Below is list of status effects, their appearance, their effects when used, and their remedies.

Lucky Sevens
Lucky Sevens (sometimes called "7 Fever") is an unusual status that affects all characters (both party members and bosses) that happen to have precisely 7,777 HP remaining. The character who hits 7,777 HP will go berserk, and hit enemies multiple times for 7,777 damage. After the battle, the character will drop to 1 HP.

Lucky Sevens is one of the well-favoured strategies for beating the Weapons and other really big bosses. It's possible to get to the Lucky Sevens state at the beginning of the battle by strategically damaging and healing the character so that they have 7,777 HP at the beginning of the battle.

One of the things you can also do is a trick where you poison a boss and simultaneously cause it to get Lucky Sevens - this way, the poison damage is 7,777 too, and some elementary math shows that 7,777 HP - 7,777 HP = 0 HP. A difficult trick to pull off, but one of the fastest ways to dispatch a tricky boss like the Materia Keeper, for speedrunning purposes.