Hi Wizards,

I was playing in Brawl yesterday with my Borborygmos and Fblthp deck. On a previous turn had chosen to put Borborygmos and Fblthp into my library. On the next turn, I decided to attack with the Urza's Construction Drone I had on the board. I made sure to check that Borborygmos and Fblthp was still two cards down in my library. Attacking triggered the Drone to seek an Urza land in the library, but Borborygmos and Fblthp was no longer visually shown in my library.

I don't believe the library was shuffled because I drew Borborygmos and Fblthp and several other cards on my next turn when I used the card draw ability on Loot, the Pathfinder.