mtg forgotten realms commander deck lists Tiamat [Dungeons & Dragons: Adventures in the Realms] Adventures in the Forgotten Realms

You can get the most value from the discover mechanic by casting the card without paying its mana cost

While Jenova, Ancient Calamity is 4 mana and two colors, it also comes with some significant benefits to outweigh those extra costs

Screeching Scorchbeast is one such card

Riverchurn Monument (one of Aetherdrift's better offerings) is a good alternative to a "mill half your library effect" and can easily pull wins out of games that seem hopeless

The goal of the build is to control the board state while ramping into big Characters that Quest for three Lore at a time or Challenge an opponents troublesome Character

Palace Jailer has a particularly powerful instance of this as it comes with an exile ability