Suggestion, instead of wasting 10-7-20 energy charges at a time, why not 1 per combat, and i dont know 10 or 5 in pvp battles, it compensates so many "BUY NOW" things lol... just a thought
Its some sort of hybrid between kingdom rush and dont touch my gems.......................................................................................?
You may shed manly beads of sweat from your eyeballs if you like.