For cards that have no such text written, this phase does not concern them
The main payoffs for discarding are graveyard interactions, and many mechanics explore that space: dredge, unearth, threshold, delve, and flashback are just a few examples
Throughout the mainline series, Rhyperior has maintained its role as a powerhouse thanks to its ability to learn a wide variety of strong moves, such as Earthquake and Rock Wrecker, which can devastate opponents
But if you are struggling to get enough creatures for your deck, then you're going to want to stay away from Prey Upon and Blazing Torch
If it's not a spell we can (or want to) cast, then this ability is virtually the same as drawing a card and having it sitting in our hand
This is particularly useful when hunting for specific versions of Rare or Mythic cards to complete your collection