Forum:Once per Dule rule?

There's several cards i know of that have a similar effect (can't remember any) that goes something like. "You can activate this card's effect to "whatever". You can use this effect only once per duel"

What if there are multiple copies of that card in your deck? Would you able to use that same effect multiple times, but only once per copy of the card or is it if you use that effect once your other copies cannot use the same effects?

TOO CONFUSING!! （╯°□°）╯︵ ┻━┻

50.35.203.49 (talk) 23:50, October 20, 2011 (UTC)