A cards value is not solely determined by its playability or original print run, but also by its specific printing, condition, rarity, and any special treatments it may possess
You could certainly argue against Grave Upheaval as an inclusion, but that Landcycling is important for 3+ color decks, and the effect is still solid at six mana for plenty of Commander pods
As an alternate win condition to loss of life or other goofy methods, winning through poison counters requires you to put ten counters on an opponent
It often uses card draw as an enters-the-battlefield effect
Whether you want to deal extra damage with a Tectonic Hazard or get card advantage with a Jeskas Will, this particular Chandra is a great way to give your spells a second chance
Natural Order is a fairly awkward fit into a lot of the cheat in decks