Ottoman Hostages
Discard from the game map as many of your

as there are
communities one of your opponent controls.
Inflict as many
rebels on that opponent as you have
communities. You may only put black cubes on units of the same
type that you discarded.
For example, you can discard one swordsman and one peasant (since the opponent has 2 religious communities) to convert their three swordsmen into rebels (according to the number of your religious communities)