My life is complete now. I just finished the last badge from the first edition of kingdom rush. Now there is a new one, i hope they will add badges very soon.
For all the people who have difficulties defeating the second boss. It is very easy if you follow this plan. Speed is key here... get the light copper sword. Get in defense position so you will take less damage. Only use thorns (poison), ramei (slow) and power slice (shatter armor). Your sword does not have to deal damage to the boss, the poison will kill him. He has 4,5 million HP but with poison he gets a percentage of his total life as damage. With the shatter armor he gets around 250.000 damage every poison round (which is quick). Stay in defense and keep the boss poisoned/slowed/shattered and watch him crumble away very fast. My sword only does around 2000 damage (which is nothing compared to his total HP) but the poison will make him cry for his mother. + this to keep it alive for others.
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 "Kingdom Rush Frontiers"){kind=icon}
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