Some are obvious, such as Blue Suns Zenith letting you draw as many cards as you can pay mana for, while others are more subtle, like Light Up the Stage exiling cards and being able to play them
It's certainly not because she is a bad leader or the Germa 66 archetype is not functional
Kitesail Larcenist turns 3 artifacts/creatures into useless treasures (one for each opponent), and he can technically hit something of yours like a Fierce Empath or a Reclamation Sage after you're done with their etb effects but need a little extra mana to cast something big
Dredge the Mire Dredge the Mire is criminally underplayed, and Im not the first to point it out
This feature can sometimes drive up the value of a box of booster packs if the cards are still in the box
In horror tribal or Dimir token decks, its a flavorful commander that grows stronger as minds unravel