Wolfcloaks is a rare dwarf unit that loses power if you have friendly units. The starting strength can be increased when leveled up. Wolfcloaks works well in control decks.
Wolfcloaks benefits when you no friendly units on the board. However, you can have structures and Wolfcloaks will not be affected.
Sometimes it can be alright to play Wolfcloaks with units on the board as long as there aren't too many.
Structures do not affect make Wolfcloaks lose strength, so use them when you can.
Interestingly, Broken Earth Drakes' symmetrical board clear can be used to remove your units from the board as well as leaving your structures intact, setting up Wolfcloaks to deal maximum damage.
Wolfcloaks can work well as a win condition due to its high strength and 2 movement. However, it will be hard moving your frontline forward while keeping the amount of units low. Structures can be used to hold your frontline instead.
On play, lose 1 strength for every other friendly unit on the board.
August 7, 2017: Increased mana and strength by 2, strength reduction from ability is now 1 at all levels
September 18, 2017: Increased strength by 1
March 20, 2018: Art updated
July 9, 2018: Decreased mana to 6, increased movement to 2, decreased strength to 6 (level 1) to 12 (level 5)