That's because there are plenty of cards that give Defenders the ability to attack, and to deal damage with their toughness, rather than their power
The problem is that he just didn't expect people to go out and buy tons of boosters, trade aggressively, or even buy singles to get the cards they want
Its almost like WotC wanted the blink kitty to create infinite loops, and the only check on such an absurd ability was an underwhelming statline
He's popped up frequently over the years in other media as well, most notably as the inspiration for Gary Oak in the anime
Since you control the spell that Spellshift countered, you can reveal cards from your library until you cast another Instant or Sorcery for free
What is happening instead is that WotC holos are really dark, especially compared to their Japanese counterparts