Guildlawyer Orzhov

At the beginning of each player's upkeep, that player may create a treasure, if they do, you create a contract enchanting that player.
{t}: Add X mana in any combination of {w} and/or {b}, where X is the number of contracts you control. Spend this mana only to pay extortionate effects.
"There's always something you want, you just must pay for that"
— Guildlawyer Orzhov