The game is free to play but all cards in the game can be earned with free play, there is no need to purchase cards if one does not want to. Though it can speed up being able to build a better desk.

Developers take into consideration feedback from the community. The community is able to be involved in many aspects of the game.

Buy and sell any card in the game with in game money.

Many TCGs often have unbalanced decks where one specific deck can trump most others, with devs being slow to correct this. Shadow Era does not have this issue as the devs spend a great amount of time making sure all the deck combinations have good balance.

Shadow era tests its players by having them decide which cards to sacrifice in order to gain resources (mana) one time at the start of each turn. No easy buildup of resources (mana) here. You want to make plays, you have to plan it out strategically.

Each turn the player has the option of sacrificing a card. These sacrificed cards have the ability to add up so that mid to late game they earn the player the ability to spend more power per turn.