#1: Isolate - There's so many good targets in Modern that it's hard to imagine a world where Isolate isn't a sideboard staple
Making a treasure is nice, but getting to manifest an opponents card as well
You should include more of it in your casual builds
Well, here in my part of Canada, one is unable to purchase any WoTC product at a SprawlMart and must make a trek to the local gaming store, which is rather fine with me as I would rather provide patronage to the retailer that plays host to me (almost) every Friday evening
For now, here is a small rundown of the most common/established formats: Limited (Draft/Sealed): In these formats, players open a set number of booster packs and construct decks from the cards they open
Huatli, Warrior Poet Ah yes, Huatli, Take One