End game isn't worth the effort, starts off as a nice Rpg but ultimately the lack of obtaining end game units is shocking. People can literally go 4,5,6,7 years before the will get a LD NAT 5. These are the strongest units. So don't expect to get top tier units. This game would only become a good if Summon rates drastically improve, remove flat stats from runes, reduce cost to upgrade runes + increase blue gem drop, making monsters purchasable similar to league of legends or atleast obtainable.