Here's my guide to all of the over-asked questions again- 1. You get cards as your hero levels up, 10 per hero, but some heroes get the same cards. 2. Grullborg Grimtooth, the Green Orc hero, has the highest max mana at 3500. Each hero is different. 3. You unlock Cave of Trials after beating the game once, and starting a New Game Plus. 4. In COT5, there is an invisible goblin that does 999999 damage. You aren't supposed to kill him, you keep him back with Mermaid water shots while the rest of your troops kill the castle. Another option is to use all ranged units, and goblins+ yetis. this holds him back until the castle dies. 5. To beat the caves, you need cards from all heroes- at least one of every "class"- Yellow+Green, both Blues, and Orange and Red get similar cards, but the more the better. Hope people bother to read this. pass over.
add name here if needs achievement for completing the game with all heros and collecting all cards that is an impossiple achievment worth 60 points:flippykid1 Mantheship Monkamon2 mako931 Cptki113r08,Madfox95,Evanpallor, paladino12, Hfdhu, deadblood105, wqreytamn , mayonaise112, MastermageX, tossmearound monkkyaaq,12neo,NikosSuperior , TheJay ,jellydemon666, n30rFTW ,smokerjokjer,dauma, Gaxel, JGBF,Iceman131,catman800,theone0_0,guilherme404
 "siftheads 5"){kind=icon}
 "Ayumilove HackerStory V1"){kind=icon}
 "Bash Your PC aka MÉTELE AL ORDENATA"){kind=icon}
 "Epic War 3"){kind=icon}
 "Platform Racing 2"){kind=icon}