Ideally, you should have a strong [warer] type ready to go once you lose a Pokmon, not something like Tatsugiri for which you risk another KO lol
In exchange for being much easier to cast at 3 mana, you receive a dream counter for each opponent you have instead of a fixed amount, and you have to tap to remove the counters for mana, slowing this iteration down considerably
Chart shows the price of Krabby [1st Edition] #51 at the end of each month going back as long as we have tracked the item.
Additionally, some cards, due to their synergy with other cards, can form deadly combos, giving one side an unfair advantage
Just imagine a whole board full of Artisan of Kozileks that can swing, each triggering the Annihilator ability, and you can get the picture of why I love this card