Its only ever going to be in Titania, but its a really cool way to make an army of elementals
And when you're actually on offense with it
The strength of any of them will depend on the context of your deck and your meta
Throw in a handful of dual lands and some playable utility lands like Bojuka Bog and Geier Reach Sanitarium, and counting only rare lands and other lands worth over $1, and the average value of the land slot in Commander 2019 has roughly doubled since last year, with the Sultai Morph deck clearly leading the way thanks to the Battle for Zendikar dual lands and the Jeskai Flashback deck lagging behind with a surprisingly lackluster mana base (especially considering it's a three-color deck)
Because this entire deck is indestructible, nothing will happen to any of the players permanents when Worldslayers ability comes into play
Worse yet, tapping down creatures doesnt remove the actual threat tapping down a Zulaport Cutthroat still leaves you open to their aristocrats effects, for example