By casting it, players can deal 2 damage, and by casting another instant with 3 mana value or more, they can cast another, reaching the 4 damage required to give you a card draw during the end step
Cavern of Souls is expensive, seeing as its a multiformat staple, but you should put it in your typal EDH decks if you have it
Other old sets from the 1990s had larger print runs, and the later in the decade you go, sealed product trends toward becoming easier to find (though Alpha is hardly the only difficult set to find sealed product for, as Beta s print run was only about 3x the size of Alpha s)
The sum of the parts here is excellent
And when they do, which is also inevitable, it is most likely going to be some free to play bullshit with microtransactions out the ass