There are Oversized Pokmon Cards (promo/collector format cards) that completely break the 2.5 3.5 rule
Sevinne, the Chronoclasm has a cool ability, but they do not have a way to interact with the grave out of the box
A hand with a Turn 1 Innkeeper, for example, is significantly better than one without, and later on, finding that key Order of Midnight or Smitten Swordmaster is very valuable
Check the total
Currently there are 3 types of booster packs to choose from, Pikachu, Mewtwo, and Charizard, each containing 5 random mystery cards per pack
You can frequently get two ETB triggers from cards like Spine of Ish Sah, or sacrifice your Executioner's Capsule-Warform token once youre done attacking with it