Thats the basic idea, but theres a bit more that goes into it: Sometimes Bargain works as a straight discount to a spell, and to make that work in the rules, you have to choose whether or not to Bargain as youre casting the spell
While precons are generally weaker than decks created by players, Mutant Menace is strong enough to hold its own without any alterations against non-precon decks
Decks like these are a treat to write about because I dont have to worry about high tech mana/power ratings or CEDH opinions
If youre on tokens, you probably take the artifacts mentioned above first, and then you jam Tocasias Welcome and Welcoming Vampire, and a Bennie Bracks if you have one (I hope he keeps being reprinted!)
Over the course of the game, you're going to be hopping across planes and seeing a wide variety of chaos effects
Put the revealed cards into your hand, then shuffle