This does limit the number of wildcards you get, but it can be done if youre on a budget
Consign Unsummon for one more mana
There are a lot of "build around me" style cards that may excel once you figure out how to use them (cards like Lady Octopus, Inspired Inventor or Behold the Sinister Six)
Collector Boosters are the best way to collect variant rares and mythic rares, as well as foil cards, and they're the only place to collect foil-etched, extended-art, and neon ink cards
However, the synergies that this deck presents are so numerous that it's a lot more difficult than answering a single spell or card in order to beat it
If you put an Aura on an opponent's permanent, you still control the Aura, and it still counts for your spells that have affinity for Auras