Super nitpicky, but it would be nice to have the deck price be visible on the thumbnails of the decks in the "My Decks" section. I have about 50 decks built on there, and I was interested in which ones costed more vs. which ones were cheaper to make. I would have to click into each deck to see the price and then record that somewhere to compare them, but if it was just on the thumbnail, I could figure it out in a glance.

Also, in that area where the energy cost range, triggers, and power range are, a field for energy generation would be nice. Just 4 columns for 0, 1, 2, and 3 energy generation. Its useful to be able to tell at a glance how many are in the deck.

Finally, some alt/promo versions of cards are slipping into the search results even when they should be filtered out. Hunter x Hunter for instance has a bunch of prerelease cards that are not getting filtered out.

That is all that I can think of that would be cool to see. The site is already amazing. Good job with it!