Very difficult to get infinity cards for 1st impact characters making 2nd impact impossible. Plus considering the fact that about 80 plus 1st impact infinity cards are needed to enhance characters to level 20!!!!!!!!!! Please apply appropriate standards of character progression in the game. Enhancement level 20 is quite steep and infinities for 1st and 2nd impact are so low. Also each hero summon is 30,000 and prime summons as 90,000 gems for 9 cards :/