if I have a unnuped deck and 6 copies of the cards above
then I can use any amount extra card in the deck? with max 40 cards and max 4 shards?
Looks I've forgot something...(sorry folks, It's late here and I'm pretty tired).
Updating rules soon, btw, nope. The number of unupgraded cards (even hypotethical) to use for using off element cards (or off element cards + shards) can't exceed the deck size.
I mean: in a 40 cards deck (without shards), you can use max 20 off element cards (20 off element cards = you've to use a fully unupped deck).