Royal

The "Royal Cards" as they are usually called, are a group of Trap cards that deal with negating the effects of other cards or restricting effects.

Another group cards that have nothing to do with these effects (like Huge Revolution or Rock Bombardment) could also be considered part of this group since they follow the same storyline. However, people usually don't refer to those cards when talking about "Royal Cards".

Playstyle
It is very difficult, if not impossible, to make a Deck of these cards. However, these all can help many different kinds of Decks, as they all have effects rooted in Anti-Meta.

Storyline
These cards all depict an Emperor and his castle or revolutionaries trying to overthrow the Emperor. It's worth noticing that the Emperor is called "Tyrant" on later trap cards, implying that he probably started to beheave as such. That would explain his later actions and the need for a revolution.

The storyline may go something like this:

Conscription→Spell-Stopping Statute→Imperial Iron Wall→Royal Decree→Imperial Order→Imperial Custom→The Emperor's Holiday→Tyrant's Tirade→Tyrant's Temper→Tyrant's Tummyache→Tyrant's Throes→Royal Command→Royal Writ of Taxation→Royal Oppression→Oppressed People→People Running About→United Resistance→Exiled Force→Huge Revolution→The Huge Revolution is Over→Asleep at the Switch→Throwstone Unit→Rock Bombardment→Royal Surrender→Liberty at Last!

Normal and Forced Ceasefire figures somewhere in there as well.