Creature Types - cschladetsch/Unity3dCardChess GitHub Wiki
There are a common set of piece types in the game:
There is some similarity with Chess pieces: Kings and Queens are like in Chess. Paladins are like Pawns. Archers are like Bishops, Gryphons are like Knights and Barricades are like Rooks.
Engines are siege engines and cannot move but can attack from a distance.
Dragons and Gryphons can be Mounted by King, Queen, Paladin, or Archer pieces.