Cheating cards into play is fun
If the token isn't exiled when the delayed triggered ability resolves (due to Stifle, perhaps), it remains on the battlefield indefinitely
While many Board Wipes offer symmetrical effects that impact each player, Olivia's Wrath is a one-sided Board Wipe that converts Vampires into mass removal
Its a pure nostalgia play aimed at tapping into the brains of people who first got into the Pokmon trading card game as kids when it started, have probably since fallen off, and now have nieces, nephews, or kids of their own, and enough disposable income to be willing to spend money to relive their childhood glory days, or at least get back that beloved foil card they lost, traded away, or had stolen back in the 90s
It's the kind of effect that makes combo players salivate and value enthusiasts grin from ear to ear
Combo, not sure yet I'm working on a build in Standard