With a higher cost of five, it can be offset by shifting her onto another character card named Belle for three into instead
The longer the game goes, the fewer cards the opponent will have in hand and if they end up without anything in hand, Dispersal will likely be doing a fairly handsome Vindicate impression one that can get around hexproof, at that
All Treasure Making Discard to Draw Stuff There are a huge number of discard one, draw two, and then make Treasure tokens for future ramping and casting things that are great to add to your deck, especially in Highlander formats like Commander where you can run them all in the same deck
Various cards in the deck get better when you have a variety of card types in your graveyard, and there are various cards that help you fill your graveyard with cards in order to achieve the required four card types
Lets use an easy example: Spirebluff Canal