Combined with heavy hitters from the Amethyst deck such as Marshmallow Persistent Guardian
While the hand size adjustments are useful, there are just plenty of other ways to manufacture this for any blue decks, and the same goes for taking care of flying creatures, as useful as Reach can be in a pinch
All it asks is that you empty your hand, and it is fast enough that it can go into those decks that try to empty their hands as quickly as possible
Sure, they can slam into each other afterwards, but its still an extra step to the graveyard, and prevents mass Indestructible effects or cards like Brought Back from working at all
For example, Gravedigger + Phyrexian Altar
Instead, always prioritize lower-cost cards that trigger desired effects off of the rest of your deck, as this is what will ultimately gain you control of the board