Naturally, set rotation also encourages the purchase of new sets as they are released
But her core ability is to let you draw a card for one black or blue mana whenever you sacrifice one of your creatures
There are so many rabbit holes to dig down, but the short answer is best explained by the Example on the "A player attacks with a band consisting of a creature with flying and a creature with swampwalk
Some players call her a secret competitive commander because she can enable game-winning infinite combos with a few upgrades, giving her a much higher power ceiling
Maui can quest for three lore, but it's his immense punching power that's the main draw
Unless you have access to cards like Necropotence, you simply wont get a better rate than that in most decks, making it very easy to run away with games through raw card advantage