It only lets you use either the turn the creature enters
Barring mass removal a la Wrath of God, or a weird combat trick (such as Giant Growth on a blocked Mahamoti Djinn), you are not losing that Wall
In that regard, they're both great successes
Play Booster Boxes (including 12 packs) aren't much better, reaching close to $1000 on the resale market right now, so buying in bulk isnt exactly economical either
Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.) Whenever you cast a noncreature spell, if at least four mana was spent to cast it, The Prima Vista becomes an artifact creature until end of turn
The workflow is built for decklists, the stock spec is what you want, and the fulfillment and shipping options make it practical