That heuristic, whether you want to think of it as suits of cards or Hogwarts houses, dictates not only whether spells are, say, more defensive or more aggressive, more telepathic or more physical, but also the personalities of the characters wielding the magic and, to an extent, those of the players, who build their decks around one or two, and occasionally even more, of those colors
Now the real work can begin.
So, basically, you could "discard" Asmor to get a 1/1
You can only use each of the following effects of "Amphibious Swarmship Amblowhale" once per turn
We have two werewolves that do just that: Daybreak Ranger and, yes, Ulrich of the Krallenhorde, but Gruul has tons of excellent cards that enable fighting like Ulvenwald Tracker and the new Domri, Anarch of Bolas
This feature saves a massive amount of time and makes the process of valuing your collection much more efficient and enjoyable