Changes
→OCG Rulings
*"[[Barrel Behind the Door]]", "[[Trap of Board Eraser]]", and similar cards cannot be activated in [[Chain]] to the effect of a Continuous Spell or Trap Card that activates and will inflict damage, such as when a "[[Wave-Motion Cannon]]" or "[[Ominous Fortunetelling]]" which is already face-up has its effect activate.<ref name="BBtD-Contin">[http://yugioh.faq.konami.jp/EokpControl?&lang=en&tid=50476&event=FE0006 Konami FAQ]: Can "Barrel Behind the Door" be activated when you take damage from a Continuous Spell or Trap Card, or from a monster's Continuous Effect?</ref>
*The current errata of "[[Cold Wave]]" is "''This card can only be activated at the start of your Main Phase 1. Until your next Draw Phase, neither play can Set nor activate the effects of Spell and Trap Cards.''". Thus, while the effect of "[[Cold Wave]]" is active, neither player can,<ref name="ColdWave-What">[http://yugioh.faq.konami.jp/EokpControl?&lang=en&tid=50650&event=FE0006 Konami FAQ]: For "Cold Wave", what is the definition of "''cannot be played''"?</ref>
**set Spell and Trap Cards from his hand.<ref name="ColdWave-What"/>
**activate Spell and Trap Cards from his hand.<ref name="ColdWave-What"/>
**activate Spell and Trap Cards which are Set in the [[Spell & Trap Card Zone]].<ref name="ColdWave-What"/>
**activate the effect of Spell and Trap Cards which are already face-up on the field, such as the effect of "[[Wave-Motion Cannon]]"<ref name="ColdWave-What"/>
===Mentions in Other Rulings===
