No casts like Emry, no sacrifices like Daretti, just one free, but this is just once, not over and again like Emry, but you don't have to wait a turn to use to tap her
They are a top-tier creature, and a well-piloted Cat deck is incredibly hard to stop in combat
Moving on, one of emeralds best qualities is the challenge effects many of its characters carry
Theres cards like Forsaken Monument for colorless decks and Maddening Cacophony for mill decks
Cards like these either replace themselves immediately, negate multiple actions at once, or bypass normal gameplay rules entirely
At first glance, getting to play two different types of cards from the top of your library and double their triggers seems amazing