Critical Command

House Rules — Before the game, this emblem
may be put onto the battlefield from outside the
game and any player may then choose to exile
it face down, otherwise the game begins with it
on the battlefield, it can't be controlled, loses all
card types, and gains protection from everything.
The cumulative penalty for casting a commander
from the command zone is reduced by {1}, and
players can't lose the game from taking a certain
amount of combat damage from a commander.