NulDeath (バマジク, Bamajiku?) is a status found exclusively in Final Fantasy It protects the afflicted from the instant death spells, Death, Kill, Squint, and Toxic. It is almost always cast through the spell NulDeath. The status is also granted by the spell NulAll.
Status effects are not blocked directly and as such there is no true immunity to any normal status afflicting spell. However, because Kill uses an alternate calculation to hit having resistance to the death element will grant effective immunity that specific spell.
Because of how the NulDeath spell is set up, the NulDeath status is never granted on it's own and is always applied along side NulStatus and NulEarth.