I think Harvester is better in a Mono Black deck because black is limited in ways to destroy non-creatures and has many ways to get value out of your own creatures dying, but if you're in, say, black/green and packing lots of green's artifact/enchantment removal, Kothophed could be superior
categorized into different Energy types (Fire, Water, Grass, etc.)
This likely isn't going to be a deal-breaker when free removal in black doesn't exactly grow on trees
Theres even an Arena starter kit
Its since started to waver, with several sales below that all-time high, but the sub-$300 listings keep disappearing almost as fast as they go up
Five of the most popular dual lands in history, the Shock Lands, are being reprinted in Standard