For example, if you discover 4 and reveal Galvanic Giant (an adventurer card from Wilds of Eldraine with a mana value of 4), you could cast Galvanic Giant, but not Storm Reading (its Adventure, which has a mana value of 7)
Heres some stats for you (I used a calculator online, so sorry if these arent right in the end, but the conclusions drawn from them are the same whether the stats are exactly correct): Assuming youre going first with 5 cards for all the following statistics, you have roughly a 34% chance of opening a card you run 3 of in a 40 card deck
And it would also save my butt, if I was facing a major threat I needed a few turns to find an answer foe, as I could chump block for a few turns until I had time to dig up something
, , Remove four oil counters from this artifact: Return target creature card from your graveyard to the battlefield