In other words, this EV is the average expected value found in a booster box
White White is going to be absolutely rammed with Moogles
Discard spells can provide a similar effect
Other cards found in the Ursulas Return set that feature this new approach to the Shift keyword include Flotsam & Jetsam, Entangling Eels - which a five strength/five health card that requires two cards to be discarded - Diablo, Devoted Herald, a card that requires players discard an action card, Li Shang, Valorous General - with players needing to discard a character card to Shift it in - Olaf, Carrot Enthusiast, a Sapphire card that can be Shifted by discarding an item card, and steel card Aladdin, Brave Rescuer: which requires that a location card be discard for it to be Shifted
The only downside is that if the caster is low on life, they may be unable to hit all the creatures they want to destroy