One of Magic: The Gathering's biggest strengths is its ability to translate a flavorful element of story or characterization into direct gameplay
For example, Aladdin is a signature Ruby character while Maleficent is for Amethyst
The combo decks of old used to rely heavily on speed and so the cheapest options tended to be the best
This is one of the best card drawing engines out there, as each iteration of it draws you a card, as opposed to just setting up future draws
White provides the core Angels, while additional colors add removal, ramp, lifegain support, or long-game value
Brought Back feels especially gross for opponents, and thats just the tip of the iceberg on ways you can increase Solitudes power