Reraise (status)

Auto-Life is a recurring beneficial status effect in the series, usually associated with the spell Reraise or the spell of the same name. Once a character reaches 0 HP with Auto-Life on them, they will automatically revive (without using any items or MP) with very little HP, usually enough for them to be killed again in one attack. It first originated in Final Fantasy VI as the spell Life3, and has since appeared in various other titles.

Final Fantasy VI
Auto-Life can only be used through the spell Reraise (originally called Life3 in the SNES and PS versions). It will automatically revive a fallen party member with barely any HP.

Final Fantasy IX
Auto-Life reappears once again as a status effect only usable by few means. The Blue Magic spell Auto-Life, the ability Auto-Life, and Amarant's Flair ability Aura are all capable of inflicting the status on a party member, and when revived through Auto-Life, the party member will revive with only 1 HP.

Final Fantasy X
Auto-Life can only be used via the spell Auto-Life or through the Mix ability Hyper Mighty G, and as in Final Fantasy VI, the party member will automatically revive once KO'ed with minimal HP.

Final Fantasy X-2
Auto-Life can only be used via the spell of the same name, though the spell itself can only be used once the player goes through all colored gates on the Salvation Promised or Supreme Light Garment Grids.

Final Fantasy Tactics
Auto-Life will automatically revive a fallen comrade right before they would be crystallized or turned into an item, being the first instance of not instantly reviving after being KO'ed. They will also revive with minimal HP as well.

Final Fantasy Tactics Advance
Once KO'ed, the character will be revived automatically, as though they had the Life spell used on them. The status can be put on characters via the Auto-Life spell, the Dragonheart reaction ability, the Aura ability, or the Angel Whisper spell.