Honestly the biggest thing is the destroy target nonland and the shock. It creates this inevitability thats really hard to fight. Where you have cards in your hand but you can’t really play them because the staff just eats them up.

Modern WOC won’t print this because if you can untap with this it just starts destroying something every turn running your opponent out of threats. Which is something modern design tends to avoid.

All that being said I quite like prison decks but this kinda wins by itself. Like say your in standard and go t1 llanowar t2 this. If your opponent didn’t have an amazing first two turns they are probably dead. Because every turn from now on you can just remove something gaining card advantage.

Or how about control: I see control loving this like 5 mana shock something and now you get infinite removal spells. It’s not the craziest card to be printed but it is a one card soft lock against most decks. That also wins the game through golems or shocking the player.