The Saga starts by turning one of their noncreature artifacts into a 0/4 Wall, just a little bigger than the Dinosaur token you get the next turn
One thing worth noting is that Invasion of Zendikar has a subtype: Siege
The effects are solid
Thats excluding one-of-a-kind and promo cards, but nonetheless, the Black Lotus card is pretty remarkable, and its value keeps increasing
It's obvious why people flock to her: She's one of the only commander option that directly benefits planeswalkers by adding extra loyalty counters (proliferate) She's a great defender of planeswalkers, being a decent 4/4 flying body that can handle bigger threats thanks to deathtouch A 4/4 flying lifelink deathtouch that also proliferates at end of turn for no mana cost is absurd value at just 4cmc She gives access to four out of five colors, allowing you to run the majority of planeswalkers but more importantly most of the best support cards, like Oath of Teferi, Primevals' Glorious Rebirth, and the most iconic of them all, Doubling Season She's an Angel
however, after you've grasped how they work, the primary mode is the co-op adventure