I say might because it does potentially come into play tapped and telegraphs a bit by needing to be activated before you cast your spell, but it is an activated ability on a land which itself is hard to counter
Ideally youll fish out another Lhurgoyf and keep the chain going
If Dryad Arbor were to leave the format, there might be an argument for giving Green Sun's Zenith another shot, especially considering all of the other cards fighting for the same slot, but until that happens, it's simply too good for the format thanks to its flexibility
With her landfall trigger, you get to manifest dread the top cards of your deck if thats the first time it has triggered this turn
Seat of the Synod: tutorable land for Trinket Mage when needed
Not Fun : This is usually reserved for older commanders who are seven-mana vanilla creatures, legendary creatures that arent meant for EDH, or are too salt-inducing for my taste