I really like running only 1, just for the option to search it, but making it an omnipresent threat to the opponent is very important psychologically against the opponent so I opted for the second copy
(or do I mistake your meaning and you mean a true 4x4 binder, one with 16-pocket pages?) Cosmos may wear better than Classic Stars, but I love the lenticular pattern of Classic Stars
It would rank better if it got a land rather than a treasure token, but this is often more than enough
These are central to the mana bases of most formats that include them and are overall well-balanced and fun
The promo cards include an Emolga, a Druddigon, a Pokmon Catcher and four energy cards
Sengirs special ability is rarely relevant, so much so that opponents often forget about it until its received its +1/+1 counter and has altered the board state and their combat math