Nah, I had other plans.

For those that know a bit of Shaddoll lore, then you know the puppet master is El Shaddoll Construct. That monster controls all other Shaddoll monsters. I was thinking the spirit of Construct was channeled through the deck and it's trying to find an appropriate host. When a duelist fights the deck and just barely loses to it, especially if that duelist uses some form of special summoning, Construct sees them as better then it's current host and take over.

Duelist who are defeated without much effort get turned into Construct's servants. Kinda like the duel ghouls from GX.