There isn't a way around this due to the way Voltron decks need to be built
Gradually I learned that a mass removal effect wasn't about what was on the battlefield, but what was in your hand
At the time, my most expensive bought card was 300 USD and I had also just bought my first car, so I wasnt willing to spend 2.5k USD (including fees) for a single card, even if it was the Base Set Pikachu and it was made of solid gold
If youre not using them for nefarious purposes yourself, youre just setting your opponents up with the mana they need to pull wins out of nowhere
You reveal five, a foe separates them, and you draw one stack, so this is a guaranteed three of the worst cards or two of the best whichever makes sense
So long as a card was printed at the common rarity it is playable (banned and illegal cards excluded)