Spectral Legion

Hidden Agenda (Start the game with this conspiracy face down in the command zone and secretly name a card. You may turn this conspiracy face up any time and reveal the chosen name.)
Whenever you cast a creature spell with the chosen name, you may pay {x} up to two times, where X is that creature's converted mana cost. For each time you pay {x}, put a token that's a copy of that creature onto the battlefield.