Board Game Arena

If I have two cards Selenia Codex, the first was summoned before, the second card is in my hand. I summon the second card Selenia Codex but I can not replace in my hand the first Selenia Codex item, although regulation by the card has all the features to be selected, ie, "on condition that the item's summoning cost includes one or more energy tokens". Unlike should be specified: with the exception of the same card. But it is not. To clarify this point unblock the new dynamics that would make some deadly combo loops, although not common.

The card cannot unsummon a 2nd codex, its been covered in the seasons faq

There is an exception. But it is only mentioned in the FAQ. Maybe they want to stop the things like you summon the two codexs and win crystals with the stick of spring.