The packs are: Sisters of the Light Rescue Team, Emergency Dispatch
However, during the Duel Monsters era of the game, Mirror Force was a pretty neat way of getting rid of all your opponents monsters
At any point, while its in the graveyard, the player can banish it from the grave to special summon an Evil Hero monster from the hand or deck, besides itself
Trading with other Duelists : Another great way to get the cards you need is to trade with your fellow Duelists
While you need to have a strong theme for a good deck, always make sure to have some staple cards too
Assuming your opponent doesn't have anything on the Field, can definitely be viable for an OTK