She can only do so when she enters the battlefield or attacks, and only if her controller has no cards in their hand at the time
Finding removal with it during the main phase ensures pilots have that removal spell on their opponent's next turn, and Bauble can be used to manipulate the library around upkeep triggers like that of Delver of Secrets to gain extra peeks
Also, Magic Online has shown itself to be completely incapable of handling a burden like this in the best of times
And then you can go wide by swinging with 5/5 dorks that don't have the "until the end of turn" clause attached
We all know how often you see great cards running around that have life gain attached, like creatures or spells that gain life as a part of what they do
Combine discarding, some new sweet madness cards that came out from Eldritch Moon, and cards with sweet abilities that you can activate from your graveyard when milled have completely changed half of the way this deck functions