raichu the pokemon card & Alolan Raichu GX - Lightning - Tag Team - 54/236 (Holofoil) SM Colorless Retreat Cost Pokemon proxy cards first edition

Mirrorwing Dragon is a 4/5 Dragon with Flying that is cast for three generic and two red mana

As a Basic Colourless Tera Pokemon, Terapagos can benefit from a lot of specific Abilities and effects such as the Sparkling Crystal ACE SPEC card or Bouffalants Curly Wall

Getting to dome someone for 5 when you cast a Force of Will

Replay land effects that get your best lands back from the graveyard can maximize your mana base

It just makes for more variety in decks that want it

Explorer is one clear example of a game mode in which players are asking (or, well, yelling may be a more accurate term, although some are resorting to humor) for more cards there's even a Support Ticket on the topic, with a lot of upvotes