Pact of the Big Three

The Pact of the Big Three was an oath made by the Big Three gods @Zeus, @Poseidon, and @Hades, to no longer have demigod children because their children tend to possess too much power. However, Zeus and Poseidon failed to achieve this and bore @Jason Grace and @Thalia Grace as well as @Percy Jackson respectively. The oath didn't have too much negative effect on them since they were gods and immortal beings. Note: @Nico di Angelo may be a child of Hades, but he was sired over seventy years ago, before the pact was made, so he isn't a violation on Hades' part.

History

Sometime around the end of World War II, the Oracle of Delphi delivered a prophecy stating that the next child of the Big Three to turn sixteen could be responsible for saving or destroying @Olympus. The Big Three had also been watching the war below, as it was fought between their demigod children and they agreed that they were influencing mortal events too much. Because of the potential danger of the Great Prophecy, and the fact that World War II was fought between their children, they vowed to have no more children with mortals.

Despite agreeing to the deal, Hades already had two children under the age of sixteen, Bianca and Nico di Angelo. Zeus, in order to make sure they didn't turn on the gods, ordered Hades to bring them to Camp Half-Blood so they could be trained, but Hades knew it was really so they could be watched. When the deadline passed, Zeus blew up the hotel Hades was staying at to kill Nico and Bianca. Hades managed to save his two children but wasn't able to save their mother, Maria di Angelo, in time. Hades later sent them with @Alecto, one of his @Furies with Nico and Bianca's memories washed, to the @Lotus Hotel and Casino to hide.

As the decades passed, the Big Three stayed true to their oath, but eventually Zeus fell in love with a TV star named @Beryl Grace and they had a daughter Thalia Grace. Upon his discovery of Thalia around twelve years later, Hades—who was still bitter over Maria's death and shocked at his younger brother's hypocrisy—was outraged and sent the most dangerous monsters of the Underworld out to kill her. As Thalia was dying, Zeus made her into a pine tree protecting the borders of @Camp Half-Blood. Poseidon also had a child a few years after Zeus had Thalia. Zeus, in his Jupiter incarnation, also had another child, Jason, with Beryl. As Pluto, Hades had another preexisting child, @Hazel Levesque, who sacrificed herself in the 1940s to stop @Gaea from raising @Alcyoneus.

As the Second Titan War started, the existence of Poseidon's son Percy Jackson became common knowledge after Zeus' @Master Bolt was stolen by @Luke Castellan, the son of @Hermes. Poseidon was forced to claim his son in order to protect him and Percy succeeded in retrieving the Master Bolt. A year later, Luke and Kronos caused the resurrection of Thalia by forcing the camp to send a quest for the @Golden Fleece by poisoning @Thalia's Tree, the Golden Fleece being powerful enough to heal and revive Thalia when it was used to save her tree. Hades subsequently had Alecto release his children from the Lotus Hotel, but Bianca was killed fighting Talos after joining the @Hunters of Artemis with Thalia subsequently choosing to join the Hunters as well and to never reach the age of sixteen.

Following the Battle of Manhattan, the gods felt that they had no reason to stay true to the pact as it hadn't worked in the first place and that strong demigods weren't a necessarily bad thing because they had actually saved Olympus. As part of his wish for saving Olympus, Percy Jackson, the demigod of the prophecy, relieved them of their obligation to it. While no other children of the Big Three have been known to have been born since the pact's dissolution, Hazel was resurrected by her half-brother Nico while the @Doors of Death were open.

Years later, Poseidon revealed that Percy was ineligible for @New Rome University as the pact meant that he wasn't supposed to exist. However, Poseidon got Zeus to agree to let Percy in if he got three letters of recommendation from gods for doing three new quests for them.

Motivations for the Pact

There are three main reasons why the Big Three Pact was made by Zeus, Poseidon, and Hades after World War II:

  1. They wanted no more disasters or wars caused by their @Demigod offspring, as their children were too powerful.

  2. They didn't want any demigod offspring that would be powerful enough to overpower them.

  3. But most importantly, the Oracle prophesied that a child of the Big Three would decide the fate of the gods and @Olympus, possibly for the worst, with an inevitable choice.