Gold Needle

The Soft, also known in some installments as a Gold Needle, is an item that appears in various games in the series. It can be used to cure the Petrify status ailment, and in some games, it causes Instant Death to opponents based in stone.

Final Fantasy
Gold Needles are able to restore Petrification. Can be bought in the beginning of the game or they are obtained from monsters that cause petrification.

Final Fantasy II
Soft in the Origins game, but renamed Gold Needles for the GBA port. Gold Needles are able to restore Petrification. Can be bought in the beginning of the game or they are obtained from monsters that cause petrification.

Final Fantasy III
Gold Needles restore Petrification, but cannot be bought till after you arrive in Cannan or they are obtained from monsters that cause petrification.

Final Fantasy IX
In Final Fantasy IX, Princess Garnet and Steiner have to help Marcus and Baku retrieve a rare key-item called Super-Soft from Doctor Tot in Treno. They need this item to rescue their petrified "brother" Blank, who is trapped in Evil Forest.

Final Fantasy X
Softs are able to restore Petrification.