Did you ever consider the math revolving around these cards, instead of just looking at the flippy side of things
Paying 6 mana is a lot, and your opponent has a window to kill it in response to the ability, leaving you with nothing
Her infamous combo is with Mind Over Matter, letting you effectively loot your entire deck to find exactly which card you need
The real fun comes from cards like Rite of Replication, Tasha's Hideous Laughter, and Karn's Temporal Sundering
"Lightning Aggro," the mono-red deck, was much more stable and predictable to build than "United Assault" if only looking at the Guilds of Ravnica metagame
PSA 10 grades can increase value by 200-400% for high-demand Gyarados variants