Sea Monster decks will love this, and with all of the draw-on-combat-damage effects in blue and green, getting some cheeky unblockable Fish is pretty good, actually
Each day leading up to the holidays reveals a surprise item, including: 8 foil Pokmon cards with a snowflake stamp 6 booster packs 7 mini 3-card fun packs 2 coins 2 sticker sheets 1 Pokmon TCG Live code card Additional holiday-themed accessories and goodies Its designed to be both a fun countdown and a value-packed gift
Im looking at you Krenko's Buzzcrusher)
While its less true than it used to be (thanks to FIRE design, cards designed for Best of 1, and increased modality/card draw in general), its still a key part of gameplay and it feels like what this mechanic, and in particular, gifting a card, was designed around
The short answer is that if you are paying more to kill a single threat card than that threat card actually cost to play you will often end up falling behind
But its existence means decks either have to be either just as lightning-fast often fully ramped up in two turns or with very specific counter cards