When you take all of this into account, as well as the fact that Tazri has only received one printing back in 2016, the reasons for the spike become clear
The Lord of Pain triggers off every players first spell, both yours and your opponents, which can quickly start to dish out tons of damage
(To Scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.) Speaking of cards that might have a shot in Legacy, heres Delightful Discovery
Breena is a three mana White and Black 1/3, with flying
For a full breakdown of how the Enchanted rarity fits into Lorcana's card hierarchy, see our Enchanted cards explained guide (linked below in Related Reading)
Kroxa is a potent threat in attrition battles, and sometimes appears as a one-of in Rakdos Scam decklists as a result