Abyss-sphere X TRAP Continuous Special Summon 1 "Mermail" monster from your Deck
You dont have to play them on the field, it doesnt even matter what your opponent has on the field at that point
If you dont sleeve all of your aspect cards at all times (we dont!), you can get away with far fewer sleeves, and the bare minimum you can go with is 2 boxes of 100 sleeves, which is enough to sleeve 2-3 (possibly 4, depending on the size of the encounter deck) hero decks and an encounter deck with some change
Meddling Mage If you don't want your opponents to play a specific card, Meddling Mage ensures that it won't happen unless the Mage is removed from the battlefield
Drawing a card while Jafar is exerted gains lore, which works out perfectly with how safe it is to exert him
Updated August 28th by Sage Ashford: Number monsters remain an important part of extra decks, both in casual play and the competitive metagame