Bill, the Professional

Protection from multicolored
At the beginning of each player's upkeep,
that player sacrifices a monocolored creature.
Whenever you tap a land for mana, add one
mana of any type that land produced.
If a creature you control would deal damage to
a permanent or player, it deals double that
damage to that permanent or player instead.
If an opponent would begin an extra turn, that
player skips that turn instead.