There are plenty of ways to get even more out of a card like PuPu UFO, especially with abilities that untap a card, allowing you to triple the amount of lands you can play in a single turn for devastating effects
(CTRL to add secondary) Boardwipe Boardwipe (CTRL to add secondary) Card Draw Black Market Connections At the beginning of your first main phase, choose one or more Sell Contraband Create a Treasure token
More stylized approaches like Justine Jones work on Glimpse the Impossible can be just as, if not more effective
At the beginning of your end step, surveil X, where X is the number of tapped Assassins you control
Shes a 2/2 flying Vampire Soldier that gets bigger with +1/+1 counters whenever permanents get sacrificed
Outside of that Im less excited, but I could imagine it showing up