Frog - troll

Troll: it makes a 3-step orthogonal or diagonal jump, no matter what any intermediate square contains. In addition, it moves 1 step forward and captures 1 step diagonally forward (like a Pawn). This permits the Troll to reach any square on the board. It can promote only when it moves like a Pawn, never by jumping 3 squares.
It is used in terrachess, Fantastic XIII