The basic combo is as such. First you activate Mishra’s Bauble looking at the top of the opponent’s library.  If the card isn’t a basic land then you play Booby Trap and name the card, then copy Booby Trap with Sculpting Steel naming the same card.  On your opponent’s turn they’ll reveal the card and take 20 damage.  The combo falls apart if your opponent has an unused fetchland, but there are measures you can take to deal with that.

Besides Booby Trap, the only fetch-able Artifact with Treasure Mage is Wurmcoil Engine.  That’s probably reason to justify not playing a full set of Treasure Mages, but what other deck has the luxury of stating that it plays a dozen creatures that start with the letter T and end in Mage?

Trophy Mage has access to a few disruptive pieces, and can potentially get more out of the board like Ensnaring Bridge and Trinisphere.  Against the right decks though, Vedalken Shackles or Crucible of Worlds can be potentially devastating.

Trinket Mage fetches the most of our utility.  Pithing Needle can shut down a lingering fetchland.  Relic of Progenitus helps slow down decks relying on the graveyard, and Chalice of the Void stops a fair share of decks.  In addition to the above disruption package, we also have a backup Misrha’s Bauble in the form of Lantern of Insight, or get some help with mana acceleration by getting an Everflowing Chalice.

Nine mana in one turn is a lot to shoot for in Modern without any kind of combo behind it.  Luckily most players aren’t interacting right now, so if an opponent’s deck stumbles, the twelve search effects give this deck an odd amount of consistency.  It is still a lot to ask for, but the pleasure of Booby Trapping someone to death is a dream that cannot go unfulfilled.