Look out, cows attack from every side of the map. They are very angry and cunning, hostile, and in every new wave they come with stronger weapons and attacks. So you need to help Vikings secure their land against attacking cows. Build armored towers along the road and use special attacks. There will be a ton of enemies all around you, so be sure to earn enough points to continuously improve the state of your defenses. Also, you can slow down attacking cows with freezers then smash them with Thor's Hammer, using special skills. Or use moospelball like one of the most powerful spells at your disposal. Use it when you lose control of the situation. Upgrade all your skills so you can respond appropriately to attacks. Good Luck!