The reason is because you'll find yourself doing a whole lot of nothing in the early part of the game, and you'll often be dead long before you get to cast those big, powerful (and expensive) spells
Bastion of Remembrance does have a mana value of 3, but its just not worth running with Yshtola
According to Mark Rosewater, these reprintings upset the silent majority of Magic collectors, and Wizards once again changed the reprint policy, this time to include premium versions of cards
Context: Ursulas Return gave Bucky players the opportunity to discard multiple cards from opponents hands as early as turn 2 while building up a board that was very difficult to interact with, creating a stressful environment that just wasnt fun
Omega, Heartless Evolution Omega, Heartless Evolution is a beast at lower power levels where you can flicker your commander or use Panharmonicon and similar effects to lock your opponents out of the game with stun counters
Copying spells like [casthaven]Rite of Replication[/casthaven], [casthaven]Fate Infatuation[/casthaven], and [casthaven]Stolen Identity[/casthaven] make Clone look silly