Cursed Ring

The Cursed Ring is a recurring accessory in the Final Fantasy series. As its name implies, it usually gives a large boost of strength, but at a high cost, usually the Doom status.

Final Fantasy IV
The Cursed Ring gives -15 Strength, Stamina, Agility, Intelligence, Spirit, and -10 Evasion. However, any armor the equipped character is wearing that resists a type of elemental attack, will absorb that element instead. Because the game does not have Accessories, the Cursed Ring is classified as an armlet.

Final Fantasy V
The Cursed Ring casts Doom on the wearer, but has 25 Defense, 5 Magic Defense, and +10 Magic Evasion.

Final Fantasy VI
The Cursed Ring casts Doom on the wearer and teaches X-Zone. Another item exists called the Cursed Shield, which inflicts many status ailments on the wearer. However, it can be uncursed and transformed into the Paladin Shield. It had been rumored the Cursed Ring can similarly be uncursed and turned into a "Paladin Ring", but this is false.

Final Fantasy VII
The Cursed Ring gives +35 Strength and Magic, +15 Vitality, Spirit and Dexterity, and +10 Luck. It also casts Doom on the wearer. It is quite rare, found only on Ultimate Weapon and in Mideel - if the player misses the change to acquire the Ring on either of these occasion, it cannot be found anywhere else.

Crisis Core -Final Fantasy VII-
The Cursed Ring gives +10% to HP, MP and AP, and +10 to Strength, Vitality, Magic, Spirit and Luck. It inflicts Curse on the wearer.