Sorcerous Spyglass was mediocre
There are plenty of discard synergy pieces in Red that make all our discarding even more powerful: we have plenty more ways to turn our cycling / looting into card advantage with Containment Construct, Conspiracy Theorist, Bag of Holding, Currency Converter, and Veronica, Dissident Scribe
Some example questions one might encounter: Does Dryad of the Ilysian Grove lose all the abilities or just the second land drop one
The game gives you an "Reset Move" option in the majority of cases, allowing you to experiment with positioning
the one that introduced the word "tribal" to Magic (although I should point out that the word "tribal" never appeared on a cardokay, except for Tribal Flames, Tribal Forcemage, Tribal Golem, and Tribal Unityoh yeah, and on Bound in Silence, but just those)
Today, they are a serious category of their own