Located in the land of Water, the Hidden Mist Village is one of the top 5 greatest Shinobi countries. The village's Kage carries the title of Mizukage. Being located in the land of Water, all of their jutsus are based on water techniques. Not much more is known about this village. Although it was commonly referred to by other villages as 'Bloody Mist Village' for its rumored brutality.
This is also the village where Zabuza and Haku originated from before they abandoned the land. The training customs of the village were revealed from Zabuza's childhood. The final exam to becoming a genin was different, and much more brutal, from the exam the students in Leaf Village had to take. The Hidden Mist was also the home of the famous Kaguya clan, a clan with Kimimaro Kaguya as its soul survivor.
Mission for entrance :-
3 battles in a row with Zabuza
Mission foe being an anbu
Win 6 battles in a row with zabuza and haku both in 1 team
Mission for being a jounin
Win 6 battles in a row with Haku in your team and you cannot use any leaf ninja in your team