Double Down

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.
If a player draws a card, they draw two cards
instead. If a player gains life, they gain twice as
much life instead. If a player taps a permanent
for mana, it produces twice as much of that
mana ins