While in the anime she barely appeared for more than a few episodes and only appearing as one of Kirito's possible love interests, there's a whole entire set of her in both volumes of the series' respective boosters, which has been shown in tournaments to be a Game-Breaker sometimes
Thanks Viperfang
Alongside the rise of Darkness, theres another type, and thats Metal
While Brain Control could be a decent Side Deck choice, there are few Normal or Effect Monsters worth controlling, rendering this card redundant
1 Witherbloom, The Balancer Borderless Foil - $59.72 The most valuable card from Secrets of Strixhaven (excluding Mystical Archive cards), and by some distance, is Witherbloom, the Balancer
This card is so powerful it has been banned in Modern and even made the Restricted list in Vintage