Shahrazad is a sorcery that is extremely high on Magic 's ban-list not because she's a powerful card, but because her effect is just so needlessly convoluted and time-consuming
For example, even if we interpreted your library as part of the battlefield for this purpose, slipping one into the card sleeve of a card in your library during a search effectively marks your deck, and that's not allowed
Ramp and card draw are foundational pillars, with Cultivate and Rhystic Study remaining two of the most popular Commander cards many years after their first printing
If your deck's key engine is a 4cmc commander like Kaalia of the Vast, for example, then you will want to run ramp cards that can get her out faster, which means ramp that is between 0-2cmc so you can cast Kaalia on turn 3 or earlier instead of her usual turn 4
More likely Dungeon Cards start in the Command zone or a special Dungeon Zone