Edison Format · March 2010
(1) If you control any other Spell or Trap Cards, destroy this card. (2) Face-down Spell and Trap Cards cannot be activated. (3) Destroy this card during your 2nd Standby Phase after activation.
The (1), (2), and (3) Continuous-like Effects do not start a Chain.
The effect of "Sanguine Swamp" that destroys itself during the Standby Phase does not start a Chain.
If you activate "Sanguine Swamp" while you control face-down Spell or Trap Card(s), it is destroyed after it resolves.