If you are in wolf side in Human VS Wolf mode, you will choose one of mutant wolves instead of weapons. By consuming WP, you can choose four kinds of mutant wolves and each one has a special skill like attack, defense and moving speed.
 
Name of
Mutant Wolf
WOLF POWER
WOLF
GUARDIAN
WOLF
GHOST
WOLF
BERSERKER
WOLF
SMART
WOLF
WP requirement 50 -250 -500 -600 -400 ~ -1200 -250 ~ -450
HP 200 300 700 200 400 200
Power Normal High the highest High High Normal
Howl Normal High the highest Normal Normal High
Move speed Normal Normal Slow Fast Normal Fast
Special ability None None Block Invisible Self-destruction Suction