Each creature you tap pays for one mana of that creature's color or one generic mana
These can range from the powerful to the absurd, an early Razaketh can let a combo deck near instantly go off, or angels like Aurelia can start generating additional attack steps, and more angels, and the snowball can get intense Time Sieve is an innocuous artifact at a CMC of two that can easily lead to a deck taking infinite turns
The amount of sorting beyond these initial efforts seems dependent on the size of the collection
Suddenly, Balance decks started popping up along the East Coast that were capable of dropping their entire hands by turn two plus casting their namesake Balance to strip out every card in their opponents' hands
Birds of Paradise, Serra Angel, Shivan Dragon, and Counterspell are all examples of cards that have left a lasting mark on Magics history
Considering these Modern titans used to sell for $40 apiece, its safe to say the mighty have fallen