While you control it, cards that are "decorated" (which the card uses to refer to cards with "premium" foil, alternate art or frames, and promo cards) have a miracle cost of one snow mana (which means that you can play the card for one snow mana if it's the first card you drew that turn)
Pokmon When it comes to momentum, Pokmon TCG isnt slowing down anytime soon
A proxy on the other hand is plain and obvious about not being a genuine Magic Card
The problem with Raticate is that it's a Stage 1 Pokmon that requires some setup to even get on the field, and then it doesn't even do that much
Being able to discard your entire hand for two mana AND draw cards to replace it is a powerful enough effect that even more degenerate graveyard-based combos could be interested
Venser also makes random other cards way stronger, like Nasty End sacrifice The Hollow to draw 3 cards for 2 mana, Vat of Rebirth gets loaded with oil as The Hollow dies, or Ringsight to give Venser skulk so we can bypass blockers while tutoring up a card