Card

Cards start in your deck and are brought into your hand.

If you have sufficient mana, you can play a card during your turn by paying it's mana cost then placing it on a valid location on the board.

You can play as many cards during your turn as long as you have sufficient mana. Or, you can only place one card per turn¹.

Many cards have restrictions on where they can be placed with respect to other cards, especially the King.

You can move any number of pieces each turn. Each time you move a piece, it costs 1 mana. You cannot move the same piece more than once each turn.

¹These rules are fluid and designed around solid gameplay, not arbitrary mechanics.