Even if you cant attack with your warped creature right away, you can tap it to station a permanent and add charge counters
Your lands can now refill your cup, and if you make sure to have a drink mustache of some kind at the beginning of combat, you get to grow your creatures
The main takeaway is that its nice to be able to reliably find an answer to a tricky permanent, or to pull out a win condition when the game is approaching a natural conclusion
Zombies even saw a bit of a resurgence, getting scattered regional tops throughout the years, as the various key cards slowly made their way off of the Forbidden and Limited List over time
Mana Crypt was one of those cards, along with Arena, Sewers of Estark, Windseeker Centaur, and Giant Badger