Kefka, Court Mage / Kefka, Ruler of Ruin Flickering Kefka, Court Mage over and over seems like a great way to deprive your opponents of resources
As for getting those noncreature spells your opponents left on the top of their library, Decadent Dragon, Gonti, Lord of Luxury, and Thief of Sanity will do a fine job of taking them for your casting
It does depend on the situation, but your opponent committing to a line of play only to be interrupted by a timely Dustshoot can just stop whatever they were trying to do that turn
5Ds For a long time, Akiza was known as the Black Rose Witch due to her sadistic nature and ability to harm her opponents through duels
This term is actually very fitting and appropriate for the card in question considering who Mars is
All cards in the Speed Duel Starter Decks contain a new marker confirming their legality for Speed Dueling