Forum:Number 16's effect

Okay, i understand that you cannot activate the declared type of cards because of Number 16: Ruler of Color - Shock Ruler's, but how does this affect monsters? does it prevent them from being summoned or prevent their effects from activating? cause it only says activate cards of the declared type, so i'm not so sure about whether this will prevent monsters' effects or summons. LastMinute (talk • contribs) 04:38, September 9, 2011 (UTC)