how do you play card king?

This is basically a match two game. You turn over each card and try to find the match, you then win the prize. The first card turn is free, then each unique card turn costs 300 gems. If you have already turned the card one though, you don't pay again to turn the same card another time. You can complete the level to start over, or start over at any point, but there is a gem cost related to that.

Before you start card turning though, you need to select a commander to play for, select from the list given. This is a great chance to start collecting and unlocking the rare legendary commanders such as Richard.

You can switch to a different commander at any point, but there is a gem cost associated with any switch.

Card King is a great way to unlock new Legendary Commanders, but it can be a bit costly in gems!