This is flat-out good, and if you have a single trigger you're relying on, the going rate is already ~3 for a single repetition via Spell, with this breaking parity by its second use
[5] Takahashi said that the card game held the strongest influence in the manga, because it "happened to evoke the most response" from readers
The four decks coming back are "Devour for Power" (helmed by The Mimeoplasm), "Built from Scratch" (the Daretti, Scrap Savant deck), "Wade into Battle" (with Kalemne, Disciple of Iroas leading the charge), and "Breed Lethality" (with everyone's favorite proliferator, Atraxa, Praetors' Voice)
Even if you untap with some removal, it needs to be powerful enough to deal with large creatures and cheap enough to let you stabilize what is undoubtedly a lopsided battlefield before you die
But 4 mana to do 3 to face while leaving a 3/2 that synergizes doesnt seem like enough otherwise
It looks simple, but theres a surprising amount of play to Terminal Velocity