Wendigo

Wendigo in forest living creature something like its protector and father figure of animals living here, its based on beast by the name windigo appearing in legends inuits in Canada, Algonquians but which was either dropped or, more likely used as the basis for the leshy.

The Witcher 3: Wild Hunt
Wendigos was supossed to appear in base game during its development in 2013 - 2014 but beast was quickly removed and we would not know of all of this if not of leaked materials.

Informations from leaked materials
''Humanlike, giant monster living in the forests. Similar to Werewolf. It’s partially made of ice and attacks people tearing out their hearts. Wendigos are afraid of fire.''
 * Role in the group: Individual
 * Preferred behavior: aggressive - chases the opponent and attacks.
 * Special attacks and actions:
 * Strong attacks - his attacks are slow paced but deal high damage.
 * Charge  - creature charges, the target is knocked down if hit. Charge can be dodged. Blocking with Quen saves from damage but not from the knockdown effect. Charge cannot be parried.
 * Bite the heart - when a character is knocked down, Wendigo can bite his heart out. It’s a extremely dangerous attack causing instant death effect. The chance for this attack is around 20%. It is very important to not get knocked down by a Wendigo.
 * Jump attack - the monster can jump from a distance of 10 - 15 meters and perform an attack. It prevents the player from escaping. Player can dodge or cast Quen to protect himself.

Defence

 * Huge creature - Wendigo doesn’t play every hit animation. His attacks cannot be interrupted with normal strikes (player has to use amplified Aard to break incoming attack).
 * Very high health regeneration.