Forum:Do ALL trap cards need a trigger?

Suppose I set "Call of the Haunted" and I end my turn. Can I activate "Call of the Haunted at any time during my opponent's turn? Or does it need to be in response to a summon/attack/spell chain? Also, would I be able to activate "Call of the Haunted" on my following turn without anything to trigger it? --Vhehs2 (talk • contribs) 21:21, March 30, 2011 (UTC)