I forgot what its called

It's a recent webtoon. All i remember is the mc (female) was a powerful mage and reincarnated into the daughter of a king whose children are literally trying to kill each other off to be the ruler eventually i think. The main character is still like 3 years old she has white hair and either red or pink eyes Last I read it was the 2nd princes' birthday party and he tried to kill every sibling in attendance but mc used strong magic to protect her other brother (who has light orange blondish hair i think). Pls help me find it cause i've nearly given up looking lol.