@Thesleepypencil The version of Ivan and the Firebird that I've read goes a little something like this (summarised):
There's a king who has a lovely garden with walls all around it. In the garden is a tree with golden apples - and every morning, one more apple is missing. The king, wanting to find out who is stealing from him, sets his three sons the task of taking turns guarding the tree. Ivan's two older brothers fall asleep on the job and miss the thief, but each night an apple goes missing. Ivan manages to stay awake and finds out that it is a firebird who is stealing the apples.
He grabs the firebird's tailfeather and brings to his father as evidence. The king tells his three sons to go out and find the firebird and bring it back to him - firebirds are way cooler than golden apples! The three brothers set off, and split up at a crossroads. Ivan goes his own way and makes friends with a wolf, accidentally finds a cool horse, and with the help of the wolf manages to a.) save a princess, and b.) find the firebird. He heads back, triumphant, to the crossroads to meet up with his brothers.
His brothers, seeing their dumb baby brother turn up with a cool wolf, a cooler horse, a very pretty princess AND the firebird, decide that that is SO not fair - those things were clearly meant for them to have, because they're older.
So, uh.
So, they knock Ivan unconscious, drag his body out into the woods, and cut it to pieces. As you do.
They leave him to rot, take his cool new stuff, and go home to their father the king - but they leave the wolf behind. So the wolf runs off (versions differ - one says to a magic island that floats/sinks in the sea, others say to Baba Yaga the witch) and finds a magic potion that can ressurrect the dead, and uses it on Ivan. Ivan thanks the wolf, and they go back to the king's castle - just in time for Ivan to tell the truth to his father, and marry the princess before his oldest brother does.
... Russian fairytales - they just wouldn't be the same without the copious amount of violence.