Sliver Queen is very much the exception to the rule here
PrintMTGs proxy/playtest cards are designed around that in-sleeve consistency idea: standard MTG sizing, familiar feel, and predictable finishing so your deck doesnt end up with one card that behaves like its trying to get caught
Drawing three cards as an instant for a single blue mana is so ridiculous that nothing even remotely close to this card has been attempted again in Magic
Besides Commander, Summon: Yojimbo looks like a card that can make a splash in Standard by fulfilling a similar role as Beza, the Bounding Spring to fend off aggressive strategies
Sauron, the Dark Lord boasts remarkable abilities, sure to draw the ire of the table - but with built-in protection to stave off their advances
Combined with a playset of Temur Battle Rage and multiple copies of Become Immense, the deck would regularly get a Splinter Twin-esque win out of nowhere with a big, double-striking trampler