It's far worse than Time Spiral, because Spiral you can use the mana you get back however you want instead of being limited to casting one card, and also you can further abuse the untapped lands with mana doublers like High Tide
Set Completion: Includes a massive roster of cards (plus unannounced Secret Rares) to bolster your collection or your deck
Brash Taunter Burn from Within Crackling Emergence Diamond Pick-Axe Hazoret the Fervent Hazoret, Godseeker Hour of Devastation Myojin of Infinite Rage Myojin of Roaring Blades Old Hob, Alleycat Blues Purphoros, Bronze-Blooded Purphoros, God of the Forge Purphoros, God of the Forge Rebel Salvo Sarkhan, the Dragonspeaker Slobad, Goblin Tinkerer Smite the Deathless Solphim, Mayhem Dominus Soul Sear Ulrich's Kindred
You lose some lifegain, but honestly this looks like a significant upgrade to me: being able to play an additional land per turn is well worth the one extra mana to cast
The original puts +1/+1 counters on itself based on the number of creatures you control, and the embalmed version does the same
Ive even seen people pair Darkrai ex with Pokmon as Farfetchd , of all Pokmon, just because the combination of its Leek Slap attack plus Nightmare Aura can do 60 damage at once not bad for a basic Pokmon
