Sure, they are card disadvantage, but they are allowed to stay, and theres something to be said for not having a threat profile, and let the others blast each other, and then rise above the masses
I think the deck suffers from a steep mana curve and little ramp, though, but theres a decent amount of cost reduction to help make up for that
This has been an often-requested feature especially when members of our community hit the jackpot and crack one of these themselves, and were happy to finally allow these cards to be traded back and forth among the community
Since the release of Modern Horizons 1, the powerful instant spell has taken some time to gain traction and establish itself as the premier control card that it is now
A colorless creature-land like Mutavault has a slightly different issue, where you can crash in when you dont have a spell to cast