Both of these spells let you search up two basic lands from your deck and put one into play while the other goes into play tapped, which ensures you have a land drop on your next turn while getting you ahead on lands this turn
If someone (even you) were to wipe the battlefield, you can have all of yours back for just one mana, since Mirror Entitys ability gives them all creature types
That's a lot of damage, which can result in a victory on turn four already
While I definitely dont think that its going to replace Jeskas Will, it seems likely that lot of decks will play both of these cards
Of course this doesnt mean you still cant have creature like that in the deck since Zimone might not always be on board, and you do have access to Blue which has blink and bounce effects to help reuse those cards, like Thassa Deep Dwelling, Essence Flux, or in Green Kogla the Titan Ape and Temur Sabertooth
Reprints in a couple of Remastered and Masters sets haven't so much as put a dent in this card's prestige and priciness, and this one won't either