Propaganda | Magic: The Gathering
Formats Propaganda is Legal in
Official Oracle Text for Propaganda
—Volrath, to Karn
Official Rulings for Propaganda
10/4/2004 : If there is more than one Propaganda on the battlefield, the cost is cumulative.
10/4/2004 : If there are multiple attacks in a turn, then you have to pay for each attack.
10/4/2004 : Paying this cost is not an instant or any other kind of ability, it is an additional cost on the declaration of the attacker.
2/1/2007 : In the Two-Headed Giant format, you still only have to pay once per creature.
2/1/2014 : Unless some effect explicitly says otherwise, a creature that can't attack you can still attack a planeswalker you control.