Doom

Doom (死の宣告「デス」[?] Shi no Senkoku/Desu?, lit. "Death Sentence"/"Death") is a Status Effect found throughout the Kingdom Hearts series. It causes a timer or counter to be placed over a single victim;s head, causing them to die after the countdown reaches 0.

Kingdom Hearts Birth by Sleep
<!dddd]--> Doom is an attack that can be cast by the Unknown. During his fight, the unknown jumps into the air, and throws the end of his whip at the protagonist. If the protagonist gets hit by his whip, Doom will take effect. The first time the protagonist is hit with Doom, the countdown timer begins at five and counts down to zero. After each successive cast of Doom, the countdown begins at one number less. To break free of Doom, the player must rapidly press / until the protagonist breaks free. While Doom is active, the protagonist cannot move, or access their Command Deck.

Doom is also an effect attached to Dark Haze. Dark Haze has a chance of inflicting Doom, where a five second timer is placed above an enemy's head. During this time, enemies are able to move around and attack freely, but they cannot dispel it. All bosses are immune to Dark Haze's Doom effect.

Kingdom Hearts
Doom is the Phantom's first attack during its boss fight. It is connected to the minute hands on the Clock Tower. When the minute hands on the Clock Tower pass each numeral on the clock's faces, the timer above the character with the Doom status counts down another number. The Phantom casts it on Peter Pan initially, then it will move to the second party member, (who is either Donald or Goofy, depending on who the player has in their party), then finally onto Sora. Peter Pan will always be first, regardless of the order of characters in the party menu. Doom lasts for the entirety of the fight, and cannot be dispelled. However, it can be delayed by either Donald or Sora if one of them casts Stop magic onto one of the Clock Tower's minute hands. If a character gets hit with Doom, they have until the minute hand goes around the clock once before their heart is stolen by the phantom. After the minute hand goes around once, the minute hand goes around the clock face another time before the next party member is stricken by Doom. Thus, the minute hands can go around the clock faces five times before the battle is lost. Healing items and Cure magic have no effect on Doom, and characters that have their heart stolen by Doom's effects cannot be revived, and their names will no longer appear in the menu. The Doom counter is not affected by Second Chance, and will kill the characters regardless of how many hit points they have when the counter reaches 0. Any character that had their heart stolen will return to normal once the battle is over.

Kingdom Hearts Re:Chain of Memories
Doom appears as one of Marluxia's sleights in his third fight. It lasts for six seconds, and can only be dispelled by breaking six of Marluxia's randomly valued cards in a Card Duel. Sora is unable to move during this attack.

Kingdom Hearts II Final Mix
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Doom is the first spell cast onto Sora by Marluxia's Absent Sihlouette, and his Replica Data. It is unavoidable and cannot be dispelled, however, using the Restore Count Reaction Command can increase the countdown by up to seven, each time it's used. The countdown decreases every time Marluxia hits Sora with his scythe. Any magic attacks used by Marluxia have no effect on the counter. The number that appears above Sora's head is equal to his level at that time, this means it can have a minimum of 1, and maximum of 99, regardless of how many times Restore Count is used. The Doom counter is not affected by Second Chance, and will kill Sora regardless of how many hit points he has when the counter reaches 0.