Hologram

Hologram is an extremely powerful common card for the defect, although at first glance it looks fairly insignificant. I would happily take up to three or four holograms in my deck. Being able to pull any card out of your discard pile is incredibly powerful and makes piecing combo pieces together much more consistent. It is adaptive, allowing you to pull either defensive or offensive cards depending on what is required. Even without providing any block, this card would still be powerful. The defect has a crazy combo, where you can use two holograms and two copies of madness to make the holograms free and then generate infinite block by having the holograms pull each other out. This works very well against the heart or with relics such as letter opener.