Drawing two cards at sorcery speed is worth 3 mana (Divination), but drawing two at instant speed typically costs 4 (Glimmer of Genius)
The exact mechanics are unknown to me, but essentially, it guarantees that youll have at least a couple of lands in your starting hand around 90% of the time
Outside of Fallout , Crucible of Worlds is a pretty valuable card, but since this one is a Fallout card , its value goes way up
Casting Cost: Card Type: Legendary Creature - Human Cleric Power / Toughness: 2 / 2 Card Text: Flying Whenever Kaalia attacks an opponent, you may put an Angel, Demon, or Dragon creature card from your hand onto the battlefield tapped and attacking that opponent
Thats not to say you cant play any way to counter your opponents spells, but you need to run modal spells like Cryptic Command that can still be useful when cast during your upkeep a few turns later
The distinction is small, and you should be happy adding signets or talismans to your deck when you need the fixing and ramp