Now i am not encouraging "Pay to win" or anything like that, if a upgrade system was implemented in pvzh then it will be like this
Every plant and zombie card has 10 levels,i will do a trick post later
Symbols:
()-Heart
"-Attack
*-Sun or brain
Cards:
Lvl2(Need 10 heroes points,it is same as seed packets):Gain +1()
Lvl3(Need 20 heroes points):Gain +1"
Lvl4(Need 30 heroes points):Take away 1*
Lvl5(Need 40 heroes points):Gain +1()
Lvl6(Need 50 heroes points):Gain +1"
Lvl7(Need 60 heroes points):Take away 1*
Lvl8(Need 70 heroes points):When card card is played,draw another card
Lvl9(Need 80 heroes points):Gain a health trait(Armored or uses health as attack)
Lvl10(Need 100 heroes points):Gain a attack trait if don't have or -1*(Strikethrough,deadly,frenzy,double attack or overthrow)