Legend first began with the devastating flood after Genesis in the Bible, which mainly tells the story of the five invasions of the gods and ancient Ireland in the12nd century.
Legend has it that the leader of the first invaders, Beth, was one of Noah's sons (this man did not appear in the Bible), but he failed to board his father's ark, so Beth and his daughter followed God's instructions and built another ark. Boarded the ark was a man named Feitan and more than 50 women.
They sailed at sea for seven years and finally arrived in Ireland. Soon, Bis and his wife died, and Fetan married Bis' daughter. Then the flood swept away everyone except Fetan, and Fetan, who survived alone, began to wander around Ireland. He became all kinds of animals and lived on for 5500 years.
The second group of invaders were Su Lang and his 48 people, who came to the deserted Ireland from the East. Legend has it that civilization was brought here by Pasulang and others. After they went ashore, Pasulang and his companions reclaimed barren hills, planted crops and built houses to have children.
Their people have settled in Ireland for 300 years. At the same time, they fought a group of monsters called Fomoria. The Pasuran and the giant fought for Irish sovereignty, and finally the Pasuran defeated the deep-sea giant and drove them to an overseas island.
Later, Pasulang's people mysteriously disappeared due to a plague, and only Duan survived. He experienced many different incarnations and was finally caught and eaten by a woman when he became a fish. She gave birth to a baby boy, a reincarnation of Tuan.
The third group of invaders was Nimmid, a descendant of Noah. It is said that he arrived in Ireland 30 years later than Pasurang and others. At first, his fleet lost its way at sea. He drifted to Ireland with nine surviving companions and founded a tribe. His clan finally reached more than 8 thousand people.
Nimmid defeated the Vermeer three times, but after his death, Vermeer harassed and retaliated against Ireland again, and his tribe resisted and killed a leader of the Vermeer. At the same time, this victory also paid a heavy price. Only 30 out of 8,000 people survived. These 30 people left Ireland to find a new home at sea.
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Geis is a common thing in Celtic mythology, which can also be spelled geas/geiss/ges, and the plural form geasa is translated into strange taboos, prohibitions or vows. It occupies an important position in Celtic mythology, but it is also the most secret part.
Geis is the sacred oath of Celtic soldiers. Whether it is done voluntarily or by others with spells and vows, it is basically inviolable. This is a taboo or achilles heel that mythical heroes usually don't know.
Compared with the killing curse, it is more like a strict code of conduct of "what can't be done/what can't be done/what can't be done under XX circumstances". When heroes and soldiers join sacred groups or accept supernatural gifts, there are usually some prohibitions imposed on them.
It has both blessing and restriction. Compliance will benefit and violation will suffer. The more oaths are given to people, the more complicated it is to abide by them, because oath bans usually require those who are given one ban to make up for another ban.
Baidu Encyclopedia-Celtic Myth