Auto-Life

Auto-Life (リレイズ) is an ability that appears in Kingdom Hearts: Chain of Memories, Kingdom Hearts II, Kingdom Hearts 358/2 Days, Kingdom Hearts Birth By Sleep, and Kingdom Hearts Re:coded. It allows the user to recover slightly if all their HP is depleted. Its effect only works once while active.

Mechanics
In Kingdom Hearts: Chain of Memories, Auto-Life is an enemy card ability that costs 60 CP to add to the deck and lasts for one use. While Auto-Life is in effect, the user is immune to ice, but is stunned by fire.

In Kingdom Hearts II, Auto-Life is a Gummi Ability which revives the Gummi Ship once when its HP is depleted. It costs 3 AP to equip.

In Kingdom Hearts 358/2 Days, Auto-Life is an Ability Panel, and it can be leveled up from Auto-Life LV1 to Auto-Life LV2 and Auto-Life LV3 by linking Auto-Life LV+ (リレイズアップⓁ) panels. Leveling up Auto-Life increases the amount of health restored, from one-third of the maximum HP for level 1, to two-thirds for level 2, and all HP for level 3.

In Kingdom Hearts Birth By Sleep, Auto-Life is a Dimension Link ability which revives the player with 25% health.

In Kingdom Hearts Re:coded, Auto-Life is an Overclock ability. It revives Data-Sora while resetting his clock level.

Kingdom Hearts Chain of Memories

 * The Vexen enemy card has Auto-Life as its effect.
 * The Black Fungus enemy card can randomly activate Auto-Life.
 * The Darkside enemy card can mimic an enemy's Auto-Life.

Gummi

 * Auto-Life is available as a Gummi Ability after completing Mission 1 of Phantom Storm with a rank of E or above.

Kingdom Hearts 358/2 Days

 * [[File:Auto-Life KHD.png]] Auto-Life ③ can be purchased for 4800 Heart Points once Roxas is promoted to Rookie rank.
 * [[File:Auto-Life LV+ KHD.png]] Auto-Life LV+ Ⓛ can be purchased for 1200 Heart Points once Roxas is promoted to Agent rank, and once again for 2400 Heart Points once Roxas is promoted to Master rank.

Kingdom Hearts Birth by Sleep

 * The Aqua Dimension Link has Auto-Life as its level 2 ability.

Kingdom Hearts Re:coded

 * The Oathkeeper and its upgrades have Auto-Life as a level 3 Clock Ability.

Origin
Reraise, also known as "Auto-Life", is a recurring status in the Final Fantasy series. When a character with Auto-Life loses all their health, it revives them with minimal HP. It is usually applied with the spell of the same name.