You can make a suggestion to replace a certain card (or multiple) with another.
Ex. Replace Iron Hands with Roaring Moon ex.
If you say just to add a card without removing any, I will automatically remove basic energy.
Each user gets 4 suggestions each.
I will comment when this community deck ends.
Have fun! If this d ck is popular enough I will do another one. Credit to Eminginjo for the idea.