It doesn't use the stack and it can't be responded to
She has three lore, she can exert characters at a whim to make them easier to challenge, and she prevents your opponent from exerting characters to sing songs which is literally one of the strongest (if not the strongest) mechanics in the game
When you add in land-searching options like Town Greeter and the landcyclers, as well as four-mana ramp spells like Reach the Horizon, getting the mana together to cast Omega, Diamond Weapon or Coliseum Behemoth is a question of when, not if
Over the years, Ravensburger has released several Villainous games for both the Marvel and Star Wars franchises, so no matter which Disney property happens to be your favorite, there's opportunity to triumph as everyone's favorite kind of villain
Other than Teferis Protection, no card really compares to this when you need to protect your board