Similarly, if a spell is cast without paying its mana cost, but the player did pay mana for additional costs such as from kicker or from Thorn of Amethyst, Vexing Bauble's first ability won't trigger and won't counter that spell
If you want to be that player at the table, you can use Ghostly Flicker to target Agent of Treachery and Mystic Sanctuary
They ultimately do much the same thing in this archetype but Elder does it more conveniently, appropriately and better
Whether you have a powered up Nykthos, Shrine to Nyx or a twice-enchanted Forest to untap, Treachery lets you grab the best creature at the table, often with a positive mana advantage
Even outside of triggering our payoffs, having a bunch of card draw is pretty powerful, letting us dig through our deck for removal and threats and making it super hard to flood out since, if we happen to draw too many lands, we can always discard them to Thirst for Discovery or Tainted Indulgence
Three reasons justify the inclusion: first, Gilgamesh, Master-at-Arms' ability only attaches one Equipment to itself from among the top six cards of your library
