Plopping it down on turn zero and then never having to do anything on your turn except play a land and attack is pretty huge
Conjurers Closet and Thassa, Deep-Dwelling will be some of the easiest ways to guarantee Lavinia keeps cheap permanents on lockdown, but having a suite of blink spells to back them up is never going to be a bad thing especially since it wont take long for Lavinia to become a priority removal target for the rest of the table
Still, you dont have to pick just one of these new scene bundles (as much as I might most thoroughly recommend The Witch-King, quickly followed by Galadriel) you can grab the whole bundle instead and add some fantastical art to your home and powerful cards to your collection.
but because all of them have very different playstyles that'll suit different kinds of person, it pays to get a heads-up on what they can do before making a decision
ONE PIECE CARD GAME PARAMOUNT WAR
If you have a lot of problematic lands in your playgroup, you'd probably rather have the ability to hit lands than a smaller consolation prize