Well, a few more than 20, but green always gets to have its cake and eat it
From that moment onwards, Spellbook would recycle their used Spellbooks and strengthen their board because more and more spells had been played until it reached a point that was unbearable for any deck
If you want to sell your Pokmon cards, it's important that you value them first so you know you're getting a good deal
Obviously if your "Deck Master" is Cyber Dragon and you summon it, you can not control any other "Cyber Dragon"s, so the name-changing effects of the other cards in that set would not work, but you could still use polymerization to summon twin/end if you had the other materials in your hand etc
Finally, we just got the full spoiler for Adventures in the Forgotten Realms Commander precons, which are likely to have a big impact on prices as players assemble decks around the new legends and upgrade their precons