1 mana cards that put a specific card on top of your library, even if youre limited to a specific card type or two, are always going to deliver value in excess of their mana cost
Blacker Lotus requires you to literally tear it up for four mana
Yawgmoth's Will ($245) Not only is Yawgmoth's Will a Reserved List card, but its also still a very competitive one
Then there are non-aura enchantments with flash, such as Dress Down and Ashiok's Erasure
If my Mono-Red opponent goes to kill my Beza, the Bounding Spring, my Three Steps can make me a new copy and get the enter the battlefield effect again, rather than simply counter the spell
You may also think that similar to Shahrazad, the card would be banned due to how impractical and difficult it would be to enforce this in a tournament setting, but you'd be wrong