Martial Coup

Oracle Text

Put X 1/1 white Soldier creature tokens onto the battlefield. If X is 5 or more, destroy all other creatures.

Card Rulings

2/1/2009 Martial Coup checks the number you chose for X, not the amount of mana you actually spent.
2/1/2009 You do what the spell says in order. If X is 5 or more, you'll put the Soldier tokens onto the battlefield, then you'll destroy all other creatures.
2/1/2009 No one can cast spells or activate abilities between the time the Soldier tokens are put onto the battlefield and the time all other creatures are destroyed. For example, you can't sacrifice one of those Soldier tokens to regenerate a Skeletal Kathari.