Building The Deck Vaja's attack ability encourages you to diversify your deck, including both Elves and Wolves (and may make you sad that there are no Elf Werewolves)
Equip three generic, one white Metastatic Evangel One generic, one white Creature Phyrexian Human Clerk 3/1 Whenever another nontoken creature enters the battlefield under your control, proliferate
Cancelling Cologne - Trainer Item Your opponent's Active Pokemon has no Abilities until the end of this turn (including Pokemon that move to the Active Spot during this turn)
The supply of certain Pokmon cards is also limited, as specific sets of Pokmon cards come and go
I got 'cha
Of course, a dedicated Etrata deck will usually have even better ways to cheat this downside: phasing or flickering her out of play before the shuffle, attacking with copies of the original or copying the trigger itself, or even destroying the target with some other assassin in response to fizzle the shuffle