It's often a safer bet to just play the removal spells and one or two expensive-to-cast creatures from your splash color
Davros, Dalek Creator reminds me of Sygg, River Cutthroat, in that you want to deal 3 or more damage to obtain card advantage
In fact, by 2005 it would be forgotten by the vast majority of people, even die-hard Harry Potter fans
Of course, forcing players to sacrifice their creatures, adding your own sacrifice outlets, and mana generation will help Sephiroth overpower your opponents
First, a little bit of history courtesy of Magic Librarities
Now, she won't toss on a bunch of +1 counters as easily, but neither of her first two abilities drain her, and her second is a strong one you can learn into