Nihonese Discipline

Discipline: San Jin, Storm Harbringer
(You may have this card used only if you have a
specific card in your deck. You start with a Discipline outside the game. Reveal it before the first upkeep.
It's rules must be followed until the end of the game.)
All creatures that are being played, must be
alligned to a place in one of 5 lanes numbered
from the left side(1,2,3,4,5). You can't move the creatures between lanes without an ability or
card description telling so.