During deck construction, choose any number of differently named cards to be part of your Stash. The cards in your Stash count towards your influence costs and limits per deck, but not your deck size. Your influence limit is additionally lowered by 1 per card in your Stash.
Before drawing your starting hand, set aside your Stash facedown. (In view of both players.)
Add a card from your Stash to your Grip.