[Always]<Valid> All <Effect> For each of your card with "Di Gi Charat" or "Petit Charat" or "Rabi~en~Rose" in its card name on Square or in Resource, this card's Cost is reduced by 2. However, the Cost cannot be less than 0. [Auto]<Valid> Square <Trigger> This card appears by being played. <Effect> If this card's Cost is 0, deal 1 damage to your opponent. Until end of turn, you cannot play a card named "Hero Di Gi Charat".