The Princess buried herself alive to ensure her people won the war against the Jukuns and her statue stands in the market square in Idah.
The story of Princess Inikpi is one of bravery and heroism.
The legend of Princess Inikpi is morbid but empowering.
She is remembered among the Igala people as a very beautiful and intelligent princess, whose selfless commitment and sacrifice helped rescue and keep the survival of the Igala nation.

Though some parts of the historical recount differ depending on who is telling the story, there are many parts that are clear.
Princess Inikpi was the only beloved daughter of Ayegbu Oma Idoko , the then Atta of Igala kingdom.
According to Atabo, an adventurer from Idah, " The Igala people usually paid royalties to the Jukun kingdom in form of palm oil, yearly, but when Attah Ayegba became the Attah of Igala things changed, he wanted independence. – He sent bowls filled with faeces instead of oil to the Jukuns." He also says her full name is Inikpi oma’fedo baba, which means " Inikpi, the father’s beloved."
This caused an imminent war between the Jukuns and Igalas (some historians say it was a war between the Bini kingdom and Igalas). However, this brooding war caused Igala land to become unsafe — farmlands being taken over by enemies and the streams poisoned.
The Igalas feared imminent death from starvation and lack of water. When the Atta consulted the oracle, it proclaimed that to ensure safety of the kingdom and victory in the war, the king had to bury his most loved child alive — the only daughter of the king, Princess Inikpi.
Surely the king was distraught and heartbroken. For days, he didn't eat or drink and he wished for an alternative solution.
The princess noticed how downcast her father was and asked to know the reason behind his sadness. Instead of opening up, he held off telling her the story for seven days, but on the eight, he relented and told her the words of the Oracle.
The Princess, who loved her father and her people as much as they loved her, could not bear the thought of holding off on the solution that would save Igala land.
Therefore, she agreed to be sacrificed and set off voluntarily to the bank of River Niger at Idah, some say market square, where she was buried along with 9 slaves who would help her in the journey to the afterlife.
According to some, when the enemies approached Igala Kingdom, what they saw was a town in flames and so they turned back with the assumption that the town (Idah) was already under attack. However, it was the influence of the sacrifice.
For this, the Igala people are forever deeply grateful to Princess Inikpi for her sacrifice and act of heroism. A statue of the princess stands at “Ega” in Idah, which is considered the Igala traditional headquarters and many Igala people bear the name "Inikpi" to honour her. Several plays have also been produced to celebrate her story.

https://www.nigerialog.com/culture/do-you-know-the-story-of-princess-inikpi-of-the-igala-people/new/#new

Go research it was the benin and igala war thats how the ivory mask was name after queen idah n iyesigie