Say, for example, you have a sealed deck that's primarily red and green, but you want to play with one copy of Garruk, Apex Predator
Omastar is just cool because hes attacking the viewer lol
Colorless Pokmon have a resistance to : Psychic, Fighting, Fire, Grass, and Water Pokmon
So to have an even stronger version of that, I think that kind of got a lot of people excited. While it may not seem like an important part of designing a card game, Creatures does spend time crafting the story of each set, but because cards can only convey so much information through images and single lines of flavor text, its not at the forefront
Over time, this enchantment locks down hands and chips at life totals, especially nasty when paired with The Haunt of Hightower to grow stronger off every discard
Be it for mono-colored cards or multicolored ones, Magic: The Gathering is all about color identity