Dual lands are still great because they can produce two mana colors, and if your deck only runs two or three colors, then chances are itll be able to cast most of the cards in your hand
zirda, the dawnwaker Jamie: 8/10 makes cycling cheaper, can take out a blocker
As a companion it would be ubiquitous in any blue-red-X deck given the formats singleton nature, which gives those decks an extra card for free without any additional deckbuilding costs or restrictions
1 Ureni, The Song Unending Power Unleashed The massive Spirit Dragon Ureni, the Song Unending is not only a beast on the battlefield, but a pretty significant undertaking in terms of mana
It also uses the graveyard to gain additional advantage over the course of the game in numerous ways - most notably by reanimating what has already died
As an example, one of the most precious cards, the Black Lotus, can cost from 100 to 250 thousand dollars per card