Urza's Saga The most value from a single land card Urza's Saga is a one-card value engine for any deck that cares about artifacts
The real terror begins when four creatures die in one turn, transforming him into Sephiroth, One-Winged Angel
Changing the rules of engagement like this is critical for control decks to flourish, as they plan to win by answering all the things the opponent is doing
This can cripple a lot of decks while leaving yours untouched if youre relying on anthem effects to do the heavy lifting
On top of that, Aurora, Dreaming Guardians three strength and five willpower pair with its two lore to make it a solid card by itself, able to likely withstand a few attacks in the early game - especially given that having Shift 3, allowing you to bring it out on top of another Aurora card for a lower ink cost, means you can have it on the field very early on
With a cost of eight, a requirement to exert all cards in the inkwell upon play, and un-inkable status, Mufasa - Ruler of Pride Rock doesn't come cheap