That surprising number can become quite threatening if you deploy a few token doublers like Parallel Lives and Doubling Season
Cavern-Hoard Dragon does have one significant advantage that Dockside never had, which is being a giant hastey flampling 6/6 dragon, which I hear has its perks
The permanent will keep any supertypes it previously had
Aside from its mana production and Cycling cost, Twisted Landscape fills the same role as Tranquil
In reality, while it certainly introduced some new toys for the format, a lot of people associate the set more with the likes of the banned Hogaak, Arisen Necropolis, the obnoxiously expensive Force of Negation, and some really cool Commander cards
Death Wind: needed removal