Answer:
Two year-Βold children who throw tantrums get this nickname. So did the tsar "Ivan."
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
A precious gift, yet it has no end, no beginning, and nothing in the middle.
Humans have two that shrink in the light and expand in the dark
They are the shore's gallant knights.
A word of five letters, Upside down is the same, A shark does this, But itβs not to blame. What is the word?