Bosk Banneret | Magic: The Gathering
Formats Bosk Banneret is Legal in
Official Oracle Text for Bosk Banneret
Official Rulings for Bosk Banneret
4/1/2008 : The effect reduces the total cost of the spell, regardless of whether you chose to pay additional or alternative costs. For example, if you cast a Rogue spell by paying its prowl cost, Frogtosser Banneret causes that spell to cost less.