I found out adding my inventory that essence sliver card from LEgions editions can't be added because the only edition having for selection in advance add card option is Time Spiral.

I was able to add Essence Sliver and select either of the two editions.

How do you manage to select the Legions edition of this card. I tried again but it's not working, and I find out that disenchant has the same problem

After you add the cards, select the red downward triangle next to the card name, click Edit Card Details, and you can set the editions of the individual cards you have.

You are right, thank you