Your bishops can't move backward toward your own side; each bishop move must stay level or advance toward the enemy.
Clergyis one of Nerf Chess's secret handicaps. In Nerf mode you choose one of two nerfs before the first move, in secret, and carry it for the whole game.
The board quietly enforces it: any move it forbids is simply never offered, so you cannot break it by accident. Your opponent never sees which nerf you took until the game ends, so every move you make is also a clue they are trying to read.
“The faith does not waver.”
Affects your bishops.