I would like to have a way to check if my cards are full playeset in a block. For example to check a playset for NPH and have a list of NPH (all cards) and from which one how many I have. Then I can easily check what still need to have the playset.

I believe it's already possible (if I understand correctly what you want to achieve):

1. Go to Card Database -> Magic the Gathering.
2. Click Advanced Search.
3. In [More Filters] choose Edition and in the new dropdown choose NPH.
4. Viola, you have the list of all NPH cards with the info about how many you have of each of them.[/More Filters]

No, I want to see all cards from the block and see how many I have and how many I still miss to have the full cards (x4 in my case)

lvalics wrote:No, I want to see all cards from the block and see how many I have and how many I still miss to have the full cards (x4 in my case)

Just select the three editions in the block and then click on the inventory count column to sort. That will quickly give you the rows of the cards in the block for which you have less than 4.

Indeed, this work well. Just need an export :-)