Rigo, Streetwise Mentor itself gives you a card, and its flexible enough that you can either focus on the attack triggers and saboteur effects (Delney, Streetwise Lookout and Enduring Curiosity, for example), or you can try to overwhelm your opponents with sheer numbers in a token build
You can destroy a player's city's blessing designation with Naturalize 2
You can drop Sapphire and Sol Ring on the first turn, as well as Black Lotus (to use either Mana Drain or Power Sink in case of emergency on the first couple of turns)
Build-Your-Own-Dockside Cavern Hoard Dragon enables a multitude of combos against artifact decks I can almost feel the Emry, Lurker of the Loch players quaking in their boots as a 7/7 dragon with haste comes barreling into their face turn 4
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