The peaceful monster forest has been invaded by brutal heroes! Become a heroic big devil！ Guard the peace of the forest! Merge your monsters! Set up your favorite lineup! Protect your castle! Destroy all invaders! ~~Addictive merge game~~ ~~Powerful tower defense game~~ ~~ Roguelike skill selection~~ ~~Super addictive casual game~~ ~~Simple and interesting strategy gameplay~~ Strengthen your monsters and evolve into invincible soldiers!