Alchemists Ingredient Holder

I got tired of my ingredient cards falling off of my player screen. Worse yet, sometimes, they'd slide through the little hole and show everyone what ingredients I was testing. 
 

So I came up with this little holder you can slide right into the gap that'll keep your cards nice and steady. 

From the cauldron side of the board, stick the long pegs through the gap. Then rock the thing in place, so that the cardboard is sandwiched in between the two pegs.