The best and newest characters are in a small pool called Latest Legends, and you have to spend game currency to get them... After a short time however, they move to a much much MUCH larger pool called Classic Legends, and at that point it is statistically impossible that you will ever draw card for one of those characters again unless you spend a lot of money. The PVP is dominated entirely by people who have spent lots of cash, no point in even trying it unless you want to pay hundred$ to win.