Then you can -2 Teferi to dig down three cards into your library and select one to put into your hand, so it's an Impulse for 3 for -2 loyalty
Being able to bounce all permanents target player controls is nice, since it leaves your stuff alone, but it's only one player
Cephalid Vandal Shred counters for an ability that churns through your library sounds like it belongs in an Un-set
Then regarding Spanish cards, they are printed in the US and The Netherlands (so made by Millenium Print Group and Millenium Print Group Europe), so you are right that they are not printed in Belgium by presumably Cartamundi and thus wont have those filler cards
Prices pulled directly from TCGplayer highlight a few essential trends: Icon cards dominate : Holo raritiesespecially Charizard, Blastoise, Venusaurcommand huge premiums due to their nostalgia, limited old print runs, and iconic artwork