Of these three, the builder wants to find any given card as easily as possible, the Standard player will want a system that allows them to store cards in sets of 4 and a system that easily adapts for rotation, while the completionist might be better off sorting their cards per set and collector number
Trainer's Notes For my own collection, I use KMC Perfect Fit sleeves for cards going into binders or semi-rigid holders, and pair them with Dragon Shield Outer Sleeves for my most valuable cards
Overall) - Gogo, Mysterious Mime This four-drop legendary Red guy is a Red version of Clone effect, since on your combat he'll become a copy of another dork, and note that they don't need to be attacking, but with haste to swing now and then a double power boost too, great
Check out the cost/production section which will show you how many sources you have for each color, compared to how many times that color comes up in the cost of your included cards